and the heads, like you mentioned are the bottlenecks. So is it simply a mater of enlarging the the inlet ports, exhaust ports and possibly the valves? Now I know the inlet ports have been enlarged by some already and this has proven positive but the MSP mani's that are at the top of the upgrade list in terms of exhaust were designed around the stock exhaust port size. If we opened up the exhaust ports, to what would safely be the maximum (likewise with the intake side), port matched it all and then through on a new set of exhaust mani's, designed to flow more are due to the larger exhaust ports on the head, would this in theory boost are low rpm curve?
"torque gets you off the line...& hp gets you over the line." - TTKeeper