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geezer#99 · 12-14-2017, 12:38 PM

So you’ve got a rompin’ Stompin’ 600 horse 427 that’s not gonna want to run nicely anywhere below 2500 rpm and you want to use a tranny that has likely all the wrong gear ratios plus o/d and you wanna change the rear gear too.
If you don’t mind running around in 3rd most of the time and carry those other 3 gears for a top end run, then it might work okay.
What gear ratios does this new tranny have?
Have you looked into a wide ratio m22?

12-14-2017, 12:38 PM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,521	Re: '06 Tremec T-56 into '68 GMC C-15 w/ 600HP BBC 427 questions... So you’ve got a rompin’ Stompin’ 600 horse 427 that’s not gonna want to run nicely anywhere below 2500 rpm and you want to use a tranny that has likely all the wrong gear ratios plus o/d and you wanna change the rear gear too. If you don’t mind running around in 3rd most of the time and carry those other 3 gears for a top end run, then it might work okay. What gear ratios does this new tranny have? Have you looked into a wide ratio m22?