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Without all the build specs. Just plugging in conservative numbers....Estimating: HP at the Fly - 288 at 4500 HP at the Wheel - 245 at 4500 Torque at the Fly - 386 at 3500 Torque at the Wheel - 328 at 3500 65MPH Cruising RPM around 2600ish | 155 HP/325 FT LB *Added a Ignition Curve chart for...

Yes, 1973 340 air cleaners had the trap door/vacuum pod on the back side.

pull a pushrod and measure. 7.5 = Flat-Tappet 6.75 = Roller

If this 318 motor is original to the truck, Its probably has a Flat-Tappet cam installed. But the block will have the provisions for installing a Roller. Trucks were late in switching over to Roller setups. If it was a car motor, definitely roller. Have a 86 Ramcharger factory 318, all...

Get a inspection camera and run down each of the intake runners from the carb opening and look at the intake valves for excessive oil on the valves/walls. I have to do this for a 350 as its puffing smoke after sitting for abit and smoking at startup.. few plugs look nasty... Fresh rebuild and...

Not all 86's were rollers from the factory. Some Flat-tappet motors have the castings for roller though. My 86 Ramcharger 318 was flat-tappet with castings for roller Some trucks were still using flat-tappets in roller blocks until later in the coming year when they finally switched over. I...