serp pulleys for 71
https://www.summitracing.com/int/par...-size/5-7l-350
Which I believe is what you should be able to find in a salvage yard from most 91' chev / GM cars. 91-up Camaro etc.
The above kit requires a reverse flow water pump which may be different than what you already have.
Last edited by cagotzmann; Oct 21, 2016 at 09:32 PM.
https://www.summitracing.com/int/par...-size/5-7l-350
Which I believe is what you should be able to find in a salvage yard from most 91' chev / GM cars. 91-up Camaro etc.
The above kit requires a reverse flow water pump which may be different than what you already have.
I didn't want to go the route that included the forward mounting accessory bracket.......
I found the correct pulleys on late 1980s and early 1990s trucks....haven't installed them yet....I'll probably use the alternator adjustment to tension the serp belt as you said.
I made sure the crank pulley was similar in diameter to the original pulley/the I.D. (hole size) for the fit on the crankshaft was identical....and the backspacing was the same/or slightly less so the rear shoulder of the pulley could be shimmed if it rubbed against the engine block.
On the waterpump pulley......same procedure....being a machinist I can drill new bolt holes if the serp pulley bolt holes don't have the same pattern....I can also add backspacing shims so it will align in the same plane with the crank pulley.
The alternator can be shimmed forward or rearward as needed.
P/S is N/A.....but I would use the same procedure.
If necessary later on I will adapt a belt tensioner to the engine.
Hope that helps.......total cost about $40 and a can of black spray paint.
Last edited by doorgunner; Oct 22, 2016 at 11:21 AM.
I didn't want to go the route that included the forward mounting accessory bracket.......
I found the correct pulleys on late 1980s and early 1990s trucks....haven't installed them yet....I'll probably use the alternator adjustment to tension the serp belt as you said.
I made sure the crank pulley was similar in diameter to the original pulley/the I.D. (hole size) for the fit on the crankshaft was identical....and the backspacing was the same/or slightly less so the rear shoulder of the pulley could be shimmed if it rubbed against the engine block.
On the waterpump pulley......same procedure....being a machinist I can drill new bolt holes if the serp pulley bolt holes don't have the same pattern....I can also add backspacing shims so it will align in the same plane with the crank pulley.
The alternator can be shimmed forward or rearward as needed.
P/S is N/A.....but I would use the same procedure.
If necessary later on I will adapt a belt tensioner to the engine.
Hope that helps.......total cost about $40 and a can of black spray paint.

Why would someone be spending almost a grand for a serp. belt?
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