87 TBI pulleys

[screamin86]

Heck yeah they look great!

[78 Chevyrado]

I just wanted to say, again, Thanks screamin!  I been looking for these pulleys for 8 or 9 months now and they are like finding hen's teeth around here.  you saved the day man!

[78 Chevyrado]

what are the differences between power steering pump pulleys?  mine is a press on fit, are all the press on fits the same?  its a 2 groove. 

I'd like to find one locally to have repainted without having to pull mine off and have 2 days of down time waiting for it to be ready to install.  One thing I love about my old truck, Its old, it's pretty, but it earns it's keep, almost daily.  i have to have as little down time as possible, cuz i hate borrowing other peoples cars. 

[screamin86]

ive got the stock pump from my car laying in the garage too ill see what it looks like compare to another one i have lol.

[78 Chevyrado]

My new gatorback belts showed up today.  tomorrow I'll get the new alternator ordered and hopefully be good to go late next week.   

[78 Chevyrado]

Got a little bit done today.  and i do mean a little. 

I got the crank and water pump pulley on there.  Having trouble with the belts.  I had to send back the stock v-belts for a 78 for the AC and PS, and swap them in for a 2" longer AC Belt and a 3" longer PS belt.   These lengths got the bolts for the adjustment grooves back to where they were before when the belt is tightened up.  The v-belt grooves in the crank pulley are larger than the ones on my stock crank pulley.  The serp. belt on the alt, is stock to an 86-87 truck.

Also since I have the old A6 AC compressor, I have to use the '78 Belt routing, and NOT the 86-87 Routing.  If I tried to use the later routing I'd have to move my AC compressor forward about 9/16" or so.  So it will definately end up using the stock '78 belt routing, but need longer belts.  If the truck has the Later small A/C compressor, I think the 86-87 routing would work.

The PS pulley seems to be lined up so far.  Ill triple check that when I get the belts on it and play with the straight edge.

For the V-belts, goodyear gatorbacks... 

STOCK (1978) A/C Belt (54.5") - Goodyear 15550
LONGER A/C Belt (56.5") - Goodyear 15572

STOCK (1978) PS Belt (41.5") - Goodyear 15420
LONGER PS Belt (44.5")- Goodyear 15450

5-Groove (1987) Alternator belt (43.5") - Goodyear 4050435

[78 Chevyrado]

I got it all setup today.  My New alternator will be here Tuesday, but I went on ahead and got it done so when it comes it'll just be a bolt in quick swap.






When I first tried it the crank pulley wobbled a good bit and I found out that the lip sticking out the back of the center hole wasn't as large as the one in my stock pulley so it wouldn't center up right.  It was an easy fix as I happened to have an impact socket that JUST fit in the hole in the old pulley and I pressed it through the hole in the new pulley, and it ended up being just right when it was fitted to the balancer.  I didn't have to move the PS pump, as it all lined up right.  No squeals from the alternator and its actually tightened properly now, not too tight like before with the v-belt to keep it from slipping.  New V-belts are daycos, as the gatorbacks were too short and have to be returned. 

Recap:
-Must make sure hole in center of new crank pulley is same size as in the old crank pulley so it will center in the harmonic balancer and not wobble

-Use the 1978 belt routing with the big A6 Harrison A/C Compressor.

-A/C belt has to be 2" longer than stock (56.5") - puts the compressor exactly where it was before.

-PS Belt has to be 3" longer than stock (44.5")  - puts the pump a little farther outward, but 2.5" seemed too tight for the bottom left adjusting bolt to get a good bite on the pump bracket.

-Use stock alternator belt for an 86 or 87 model c10/r10 with a 350 - no modifications needed

NOTE:  you guys check your alternator to make sure its STRAIGHT.  turns out mine was off some, it was cocked inward, horizontazlly.  I had to put some thin wahsers for shims under the bolt that holds the upper alt. bracket to the water pump.  i put 2 fairly thin washer between the bracket and water pump.    the upper hole to the intake manifold it a slot so adjustments are super easy.


Thanks again Screamin!

[screamin86]

Looks great! Glad it worked out for you!

[78 Chevyrado]

The end result is here:
http://forum.73-87chevytrucks.com/smforum/index.php/topic,9090.285.html

Didn't wanna double post, and I always keep this stuff in my build threads anyway.