My 318 i am using the # 302 heads, with stock 1.78 intakes;
Mopar Performance cam # 4452759
Dual exhaust off the stock manifolds, that goes to 2 1/4",
with Dynomax Super Turbo mufflers.
Edelbrock LD4B intake, {I used this old style intake;to have the small runners, for the small 318 cid.}
Edelbrock # 1406 600 cfm "AFB" carb.
Electronic igntion.
2.94 Sure-grip, 25.3 inch tires.
Got from 17-21 mpg going to/ from Carlisle last year. :thumbup:
http://store.summitracing.com/partdetail.asp?part=DCC-4452759&N=115&autoview=sku
Basic Operating RPM Range: 1,200-5,200 RPM
Intake Duration at 050 inch Lift: 221
Exhaust Duration at 050 inch Lift: 228
Duration at 050 inch Lift: 221 int./228 exh.
Advertised Intake Duration: 260
Advertised Exhaust Duration: 268
Advertised Duration: 260 int./268 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.430 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.450 in.
Valve Lift with Factory Rocker Arm Ratio: 0.430 int./0.450 exh. lift
Lobe Separation (degrees): 110
If you go much larger on the cam, your fuel economy will drop.