Finally got my first 86!

[Swims350]

I think it's safe to say it's no an 86 model motor....

B4T 86 305 Chevelle 165 LG-4 700R 4-Brl 
B4T 86 305 Impala 150 LG-4 700R 4-Brl 
B4T 86 305 Camaro 165 LG-4 700R 4-Brl 
C7D 86 305 Camaro 165 LG-4 700R 4-Brl 
C7D 86 305 Pontiac 165 LG-4 700R 4-Brl Firebird
C7H 86 305 Camaro 165 LG-4 700R 4-Brl 
C7H 86 305 Pontiac 165 LG-4 700R 4-Brl Firebird
D3M 86 350 Truck 160 LT-9 Manual 4-Brl 3/4 & 1 TON
D3N 86 350 Truck 160 LT-9 Manual 4-Brl 3/4 & 1 TON
D3P 86 350 Truck 160 LT-9 Manual 4-Brl 3/4 & 1 TON
D3R 86 350 Truck 160 LT-9 Manual 4-Brl 3/4 & 1 TON
D3S 86 350 Truck 160 LT-9 Manual 4-Brl 3/4 & 1 TON
D3T 86 350 Truck 160 LT-9 Manual 4-Brl 3/4 & 1 TON
D3U 86 350 Truck 160 LT-9 Manual 4-Brl 3/4 & 1 TON
D3W 86 350 Truck 160 LT-9 Manual 4-Brl 3/4 & 1 TON
D3X 86 350 Truck 160 LT-9 Manual 4-Brl 3/4 & 1 TON
D4A 86 305 Camaro 165 LG-4 700R 4-Brl 
D4A 86 305 Impala 150 LG-4 700R 4-Brl 
D4A 86 305 Chevelle 165 LG-4 700R 4-Brl 
D4B 86 305 Camaro 165 LG-4 700R 4-Brl 
D4B 86 305 Chevelle 165 LG-4 700R 4-Brl 
D4B 86 305 Impala 150 LG-4 700R 4-Brl 
D4C 86 305 Camaro 190 LB-9 700R TPI 
D4C 86 305 Pontiac 190 LB-9 700R TPI Firebird
D4K 86 305 Camaro 190 LB-9 700R TPI 
D4K 86 305 Pontiac 190 LB-9 700R TPI Firebird
D4W 86 305 Pontiac 190 LB-9 700R TPI Firebird
D4W 86 305 Camaro 190 LB-9 700R TPI 
DDA 86 305 Camaro 190 LB-9 700R TPI 
DDA 86 305 Pontiac 190 LB-9 700R TPI Firebird
DDC 86 305 Camaro 165 LG-4 700R 4-Brl 
DDC 86 305 Pontiac 165 LG-4 700R 4-Brl Firebird
DDD 86 305 Pontiac 165 LG-4 700R 4-Brl Firebird
DDD 86 305 Camaro 165 LG-4 700R 4-Brl 
DDH 86 305 Pontiac 190 LB-9 700R TPI Firebird
DDH 86 305 Camaro 190 LB-9 700R TPI 
DDJ 86 305 Camaro 165 LG-4 700R 4-Brl 
DDJ 86 305 Chevelle 165 LG-4 700R 4-Brl 
DDJ 86 305 Impala 150 LG-4 700R 4-Brl 
DDK 86 305 Marine 165 LG-4  4-Brl Excalibur
DDK 86 305 Camaro 165 LG-4 700R 4-Brl 
DDK 86 305 Chevelle 165 LG-4 700R 4-Brl 
DDL 86 305 Impala 150 LG-4 700R 4-Brl 
DDL 86 305 Chevelle 165 LG-4 700R 4-Brl 
DDL 86 305 Camaro 165 LG-4 700R 4-Brl 
DDL 86 305 Chevelle 165 LG-4 700R 4-Brl 
DDM 86 305 Chevelle 180 L-69 700R 4-Brl Monte Carlo SS
DDP 86 305 Chevelle 180 L-69 700R 4-Brl Monte Carlo SS
DDS 86 305 Camaro 190 LB-9 700R TPI 
DDS 86 305 Pontiac 190 LB-9 700R TPI Firebird
DDT 86 305 Camaro 190 LB-9 700R TPI 
DDT 86 305 Pontiac 190 LB-9 700R TPI Firebird
DDU 86 305 Chevelle 165 LG-4 700R 4-Brl 
DDU 86 305 Impala 150 LG-4 700R 4-Brl 
DDU 86 305 Camaro 165 LG-4 700R 4-Brl 
DDX 86 305 Camaro 190 LB-9 700R TPI 
DDX 86 305 Pontiac 190 LB-9 700R TPI Firebird
DDY 86 305 Pontiac 165 LG-4 700R 4-Brl Firebird
DDY 86 305 Camaro 165 LG-4 700R 4-Brl 
DFM 86 305 Impala 150 LG-4 700R 4-Brl 
DFM 86 305 Camaro 165 LG-4 700R 4-Brl 
DFM 86 305 Chevelle 165 LG-4 700R 4-Brl 
DFR 86 305 Camaro 190 L-69 5-Spd 4-Brl 
DFR 86 305 Pontiac 190 L-69 700R 4-Brl Firebird
DFS 86 305 Camaro 190 L-69 5-Spd 4-Brl 
DFS 86 305 Pontiac 190 L-69 700R 4-Brl Firebird
DFT 86 305 Camaro 190 L-69 5-Spd 4-Brl 
DFT 86 305 Pontiac 190 L-69 700R 4-Brl Firebird
DFU 86 305 Pontiac 190 L-69 700R 4-Brl Firebird
DFU 86 305 Camaro 190 L-69 5-Spd 4-Brl 
T9U 86 305 Camaro 165 LG-4 700R 4-Brl 
T9U 86 305 Chevelle 165 LG-4 700R 4-Brl 
T9U 86 305 Impala 150 LG-4 700R 4-Brl 
T9W 86 305 Impala 150 LG-4 700R 4-Brl 
T9W 86 305 Camaro 165 LG-4 700R 4-Brl 
T9W 86 305 Chevelle 165 LG-4 700R 4-Brl 
U5A 86 350 Truck 160 LT-9  4-Brl C-20 & C-30
U5C 86 350 Truck 160 LT-9  4-Brl C-20 & C-30
U5F 86 350 Truck 160 LT-9  4-Brl C-20 & C-30
U5H 86 350 Truck 160 LT-9  4-Brl C-20 & C-30
UBL 86 305 Truck 145 LF-3  4-Brl C 10 & C 20
UFA 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UFB 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UFC 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UFD 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UFF 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UFH 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UFJ 86 305 Truck 145 LF-3  4-Brl C 10 & C 20
UFK 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UFL 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UFM 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UFN 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UFP 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UKR 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
ULA 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
ULC 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
ULD 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
ULF 86 305 Truck 150 LE-9  4-Brl C 10 & C 20
UPA 86 350 Truck 165 LS-9  4-Brl C 10 & C 20
UPB 86 350 Truck 160 LT-9  4-Brl C-20 & C-30

[86gmc23]

I would say not ha. I'll look at heads tomorrow. Guy told me that it was a 305 corvette motor, but that doesn't appear to be true. How can I tell if it is a 305 or 307? Not sure if this matters but I measured the bore with a tape measure and it looks to be pretty close to 3.75"

[Swims350]

you need to pull the casting number off the back of the block, on the bellhousing area close to the 5.0lg thing. I beleive it's an 80ish block and to my knowledge 307's stopped in like the 70's. You should also look at the crank where the flywheel bolts, on the block side, to see if it's a 1 or 2 piece rear main seal, I'm thinking it's a 1 piece which has an aluminum adapter bolted to the block, kinda hard to see with it in the vehicle and such.

As for being from a corvette I call BS, I don't think they'd ever waste time putting a 305 in a vette, but I could be wrong, not sure if they ever had 305 vette's. I think it's the late 80's camaro block I posted in the suffix link first time.

Find the long sequence of numbers on the bellhousing flat and post it.

[oldwhity]

Swims350, the "GM 5.0LG" is the casting number. From what I've read, this kind of casting signifies a later year block. It just doesn't match the suffix codes(which can be altered).

[Swims350]

No, there's a casting number back there a series of numbers, I've had 350's and 305's with that 5.0 crap and 5.7 and there's a casting number back there on another flat, not the same flat as the 5.0 there's another one. I have never seen there, NOT be a casting number on the back.

How does it not match the suffix? I posted that an 88 camaro chc suffix had a 305. I'd almost bet money on it being that one.


I have an 88-95 block right now that has 5.7 lg stamped on that spot and has a long casting number on the back of the block next flat(area between bellhousing bolts) up and it's the casting number.

I also had an 86 truck same deal.

yea the 5.x stamped ones are like a later model and why I said I beleive it's an 86 and up block.

[Swims350]

That is the casting number, it's on my 88's 350 and it's on the flat above the 5.0lg mark as you can see and it's on the driver's side, I think looks like it's PS in the pics due to the bolt location. It's between the point of the bellhousing and the bolt that's about 4 inches from it on one side or the other.

[Swims350]

hey 86 I ran your head numbers from the 305 build thread they are from this..

14101081 305 87-94 1.84/1.50 58cc

So that makes me think more again that you have an 88 camaro 305 in your truck. I know they can change heads on a motor, but find the block casting as I posted and show me and I'll find out what it comes up as.

I'd bet it to be one of these...

14102058 305 86-88 140-180 Car & Truck 2-bolt Passenger stick 1-piece seal
14101147 305 86-up  2-bolt Passenger stick one piece seal
14094766 305 86-up  2-bolt Passenger stick one piece seal
14088551 305 86-88 140-180 Car & Truck 2-bolt Passenger stick 1-piece seal
14093627 305 87-88 140-180 Car & Truck 2-bolt Passenger stick 1-piece seal


If you got the intake off of it I can run them numbers or the exhaust manifolds as well, or even the crank.

[86gmc23]

Got all that and took a picture of manifold numbers but I will have to load them and post, deep frying some chicken wings right now but will post soon

[Swims350]

yea find the number on the back of the block for sure it should help alot.

[86gmc23]

Here is pictures of manifold... Dog ate two nice chicken bones, not good.

[Swims350]

sorry man only found one close, yours ends in 5 and not 3 but here it is..

14057053 305/350 80-88 4-Brl Aluminum Quadrajet

The one on the back of the block is the most important it's a long number like the one on the intake, try to clean it off and find it if you can. That will help tell you the year of the motor.

[86gmc23]

When you say on back of block you dont mean where tranny is right, back around area i found the GM 5.0LG?

[Swims350]

yes sir did you see my picture of my 88 trucks block? that's where it is, it's on the back and near the 5.0 you found it's one flat area or boss or pad above it, either on the driver's side or pass. I forget which but it's there and it's a long number just like the intake.

[beastie_3]

It is on the driver side of the block, behind the head at the firewall. It is right before the transmission. You might have to wipe it off to read the numbers properly.

[86gmc23]

Gotcha, will check it out tomorrow. Thanks again