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Old 12-01-2021, 11:50 AM   #19
MikeB
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Join Date: Jul 2000
Location: North Texas
Posts: 3,672
Re: Rear end help needed please...

Quote:
Originally Posted by 1G1YY View Post
My tip is that you use an engine rpm calculator...it will be your friend.
I just did this with your setup....3.07 rear, 28" wheels at 65mph .
With a 3 speed auto your engine will be doing 2459rpm.
Don't forget torque converter slip.
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Mike
1969 C10 LWB -- owned for 36 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- converted from 250-six to roller cam 350, Vortec heads -- sold
1981 C10 Silverado LWB, 305, TH350C -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
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