Quote:
Originally Posted by NEWFISHER
I have a worked over 250 in my daily. Lump ports, hei, z28, big cam , milled , balenced, cast headers, clifford and 390. I get 16 to 19.5 with a 700r4. And 3:73. It was worse with the 4spd and 3:08s. Tons of torque, good power great milage. Look up Tom at 12bolt.com and follow his direction. Problem is, you can build 3 or 4 small blocks for what you will have in the warmed up 6.
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Not really the price of 3 or 4 but maybe one moderate 8. Anyway, the six always torques better/lower than the 8. And, a six is never JAFSB !!!!
I could see mileage being worse with a 6 and the 308 rear. Trucks are heavy and bricklike and the motor is small. Pretty much seems you may have it lugging all the time with 308s.