Re: replacing 351 with an I-6 300
well since you got the I-6 truck I'm sure you have the motor mounts and radiator to go with it. Bone stock I got 15mpg with my 83' bronco with a 6 popper and 4speed. I've had 2 80's broncos with 351w and never seen better than 10mpg
. I now have a beefed 6 popper and love it, I finally got it dyno tested and it puts out 205 hp and 310ft-lbs. of torque (stock 121hp and 232ft-lbs.) with a offenhauser intake, 600cfm edelbrock card, hooker supercomp headers, 9.2:1 compression, intake port matching, and a Torquey camshaft (compcam 260H cam). but my milage has droped to about 12 mpg with 3:50 gears and 33" thornbirds. my zero to 60 is around 9-10 seconds and My quarter mile droped from 22 second to about 18 seconds. and in the mud NO 302 can chug along at 500RPM like a I6
Do'n it with only 6 cylinders!
member of Team boarcock off-road club