Who has a newer transmission on their 305 V6 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**wcstory** · 11-11-2015, 12:48 PM

I love the uniqueness of my big block 305 v6 in my 1966 GMC 2500, but the 45-50 mph top end sucks. First gear is low enough I can turn the step on the gas and turn the key to go from a dead cold stop.

I'd like to switch to a more modern 5 speed manual transmission, but the GMC BB v6 does not use the GM standard bell housing bolt pattern. What is needed to swap to a Borg Warner T5 or a NV3500/NV4500?

I've also been looking at Bendtsen’s Transmission about their adapter kits to run the 4 speed automatic 700r4 and 4L60E transmissions. The idea of just cruising without shifting is appealing.

What are you running and what did it take?

11-11-2015, 12:48 PM	#1
wcstory Registered User Join Date: Jun 2006 Location: Cape Cod, Ma. Posts: 236	Who has a newer transmission on their 305 V6 I love the uniqueness of my big block 305 v6 in my 1966 GMC 2500, but the 45-50 mph top end sucks. First gear is low enough I can turn the step on the gas and turn the key to go from a dead cold stop. I'd like to switch to a more modern 5 speed manual transmission, but the GMC BB v6 does not use the GM standard bell housing bolt pattern. What is needed to swap to a Borg Warner T5 or a NV3500/NV4500? I've also been looking at Bendtsen’s Transmission about their adapter kits to run the 4 speed automatic 700r4 and 4L60E transmissions. The idea of just cruising without shifting is appealing. What are you running and what did it take? __________________ 1966 GMC 1 Ton 305 V6 SM420 4 speed - retired Fire Dept Support Truck from Little Falls, NJ My GMC Photos



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