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Old 09-25-2020, 09:57 AM   #30
Aruba1
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Join Date: Apr 2014
Location: Birmingham, AL
Posts: 560
Re: C30 heavy duty rear axle top speed

This is the exact same setup as mine... 70HD, shorted drive shaft, welded suspension brackets and repositioned leaf brackets. I like the leaf springs setup. What stock with the truck or it came from the donor? Did you had to reposition the rear leaf brackets or was it a bolt-on?

Quote:
Originally Posted by allchevy58 View Post
On my 1964 C30, it had 5:14. I bought a Dana 70HD, with sway bar out of a 77 Chevy C30 dually, installed 4:10 with posi. Bolted right in, welded some shock mounts and shortened or lengthened the drive line, can't remember. 65 mph at 3,000 rpm. Had a ratio adapter built for the speedometer so speedo is right on.
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