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**crossy** · 09-09-2007, 08:30 PM

The big sixes are too long and the 6.2 and 6.5 Chevys just dont knock down mileage numbers like that[/QUOTE]

and they won't last 500K miles. I actually met a guy last year with a SWB chevy and 4BT. it had the stock 3.08 rear and a 700R4. he said 26-28 faithfully if he stayed out of it and he had it bumped up a bit . if yoou get one with the old VE pump on it a few turns of ascrew can double your power, seriously, w/o affecting mileage too much. His truck was running low 15's that day in the 1/4 mile. the 4BT is a 3.9L, supposedly weighs about what a BB chev does. I LOVE the idea.crossy

09-09-2007, 08:30 PM	#6
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,039	Re: Cummins 4bt conversion The big sixes are too long and the 6.2 and 6.5 Chevys just dont knock down mileage numbers like that[/QUOTE] and they won't last 500K miles. I actually met a guy last year with a SWB chevy and 4BT. it had the stock 3.08 rear and a 700R4. he said 26-28 faithfully if he stayed out of it and he had it bumped up a bit . if yoou get one with the old VE pump on it a few turns of ascrew can double your power, seriously, w/o affecting mileage too much. His truck was running low 15's that day in the 1/4 mile. the 4BT is a 3.9L, supposedly weighs about what a BB chev does. I LOVE the idea.crossy __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww LOTS of Cummins trucks.