used 350 HELP PLEASE

[murraygmc]

ya thanks i got to get the manifolds off anther truck in a junk yard    it has a 350 2  but hopefully ill get it butend up yhis weekend

[Russ130]

The 4.3 you had was basically a 350 with 2 middle cylinders eliminated. So with that being said it stands to reason everything on the front of the motor will swap right over and the tranny and starter are the same basically. I would have to believe the motor mounts are the same as well. I did a swap from a 6 banger a few years back on a firebird that had a 2.8 and still had the same mounts just had to bolt into different holes on the frame. Unlike the 4.3 that motor shares nothing with the 350 so I had to get a new tranny, exhaust, radiator and front springs. However all the electrical hooked right up like the oil sensor and temp. Keep an eye on your front end for sag from the extra weight. Your carb will work but you will need a new intake that is a 4 barrel or you could get an adapter plate but those are more problems than they are worth. Since the 4.3 and the 350 share the same bore and stroke the carb should work fine without any mods. I think you are going to run into some clearance issues up front since the 350 is longer but I don't think those will be too hard to overcome. For instance you might have to swap from a clutch fan to a flex fan with the correct size spacer and you may need to trim the fan shroud a bit too. Don't forget you will need and 8 cylinder distributor if it didn't come with the motor.

[murraygmc]

kool thanks a mill guys  so i guess i just need to buy frame mounts and get that puppy bolted up huh

[Captkaos]

The fan shroud will be an issue, but the motor mounts are different AFAIK.  They were different on another members truck when they switched to a V8.

[murraygmc]

just picked up a shroud ang got the frame mounts ready to pick up at nappa       im geting excited 

[murraygmc]

ok motor mounts are a big issiue what do i do now i need to get this swap done saap and get the truck out of the shop

[VileZambonie]

The motor mount locations are different. The mounts need to be moved. I'll see if I can find a pic of the location for ya.

[VileZambonie]

V6


V8

[murraygmc]

thanks  vile so backily i nee the whole frame mount off of a v8 4x4  an thats it i don have to move my crossmember

[VileZambonie]

Huh?  Just move the mounts to the proper holes. It's that easy.

[murraygmc]

vell i really like you trying to help me but i cant just slide the frame mount foward its a 4x4 and the cross member is in the way pluss i have no holes that will mach up 

[zieg85]

vell i really like you trying to help me but i cant just slide the frame mount foward its a 4x4 and the cross member is in the way pluss i have no holes that will mach up 

Look through http://forum.73-87chevytrucks.com/smforum/index.php?topic=11311.0;topicseen  There is a picture of a 4x4 with the engine removed to see what you need.

[VileZambonie]

I'm not following you here. Just put the V8 mouts in the proper holes.



Click this LINK

[murraygmc]

ok guys im not trying to be a paine but im takinh a v6 out of my 1985 gmc 4x4 so from the end of the block to the motor mount its 10 " on the v8  350 its 14 inches from the end of th block to the motor mount  with that being said i have a crosmember siting fight ight in front  of the "frame" mount  so im guessing thay made a frame mount for the v6 an a diferent one for the v8 or do i have to fab a new one 4 my truck ? or drill the rivits to the crosmember and move it  cuz that is whats in my way  i figuerd that this woul b a straght foward swap but im dead wrong i cant slide my tranny back its agenst the fire wall and its a manual ..... the v6 frame mounts will not slide foward the crossmember is in the way ( an by the way  when i say frame mount im talkinf bout the bracket that bolts to the frame  not the motor mounts)

[ccz145a]

Post a close up of each side.