[X-TECH MAN]

OK Bill......Im no pro but from what I know it is the cam that is causing the varience in boost. I would think that a cam with 112 centerline with a little more duration @ .050. Something around 230 degrees on the intale and 240 on the exhaust. The blower calms the cam down and will make it run fairly smooth. . When you go to a 402-408 inch piece you will need more cam. Larger engine needs more duration (air flow) because the cubic inches makes the cam think its smaller. The heads (Magnum) are OK but need some work. The exhaust is better (almost 30 %) than the old LA style head. Ive done quite a bit of playing with the 360 Magnum style heads in crate motored stockers and bracket cars. Also with all that instant torque it might hook better and the chassis will work better with the 4:10 gear. Im not an expert by far but just from what I have found over the years, In case a blower is not always a blower I can only say Ive worked on the DRAW THRU type and not the blow thru versions. Terry