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Serpatine belt drive from early 90s chevy truck to older 350

ChrisHall1985

ChrisHall1985

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Rangely, colorado
I am tring to find out if the serpantine belt from a early 90s bracketry will bolt up to a older 350 are the bolt holes the same or did the block change to mount it
 
When I swapped the 91 serp setup to my older 383 cu. in. motor I had to drill just 1 hole in the front of 1 of the heads, don't remember which one, but no big deal.
Tarey
 
i didnt even drill the hole in mine. been going strong for 2 years no problems.

only thing you might find diffrent is the metric to american bolts possibley for the power steering pump to bracket. tiny problem realy.

i love it now no more belts to keep tight.
 
If you do decide to go with the serp set-up make sure you also change your water pump and fan as the serp pump is reverse rotation.
 
Bolted all the serp stuff onto a 400. Used the TBI heads, so that stuff went out without a hitch...
 
Here's one I modified to hold a few extra goodies. It was pretty much a bolt and go for the stock stuff.


100_4518.jpg

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100_4523.jpg
 
Can you bolt the crank pulley bolt onto the old harmonic damper or do you have to use the damper off the serpentine engine?
 
Well I've seen some where the pulley is part of the damper, but I don't know if that's specific to LT1, LS6 or something else.

I have been wondering if I could convert to serpentine without losing my crank position sensor (which is on the damper)
 
Blue85 said:
Well I've seen some where the pulley is part of the damper, but I don't know if that's specific to LT1, LS6 or something else.

I have been wondering if I could convert to serpentine without losing my crank position sensor (which is on the damper)
Click to expand...

The very early 283's had the pulley riveted to the harmonic balancer but every other SBC up until at least the production of the LS series engines had a bolt on pulley. What engine do you have?
 
Sorry, I need to Hijack. but When I put mine in I took out the A/C compressor. I can not find out where to get the pulley that goes in place of it, does anyone know where to get one?
 
Ok, a bit off topic, but along the same lines. Will the serp setup from a 4.3 work on a older 350? The reason I ask is that I have the 92 Astro I am stripping, the engine is going into the 94 I have, so I have a complete serp setup out of the other van. It is the newer nicer aluminum brackets, but it still keeps the AC compressor on the DS, and doesn't have AIR pump provision which I no longer have on the Blazer. I just want to make sure that keeping this stuff around is worth it, I love the serp setups, just want to make sure it is going to work.
 
Yes it will work. The 4.3 and all SBC V/8's are the same on the front. The 87 and later heads do have one extra hole in the ends of the heads but it will still work.
 
I have a Goodwrench 350 with 8" damper. The ones I'm thinking of must be LS-series engines, then. Good to know. I have the triple V-belt pulley now.

PICT0055.jpg
 
4X4HIGH said:
Yes it will work. The 4.3 and all SBC V/8's are the same on the front. The 87 and later heads do have one extra hole in the ends of the heads but it will still work.
Click to expand...
Cool, thanks Scott. Guess I will just have to add to the pile of parts that is growing in the storage shed.:grin:
 
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