I am almost done tearing down my 351W. All I have left is to take the crank, rods, pistons, and main bearings out so I'm starting to do some heavy research of ways to increase horsepower and stay within a budget at the same time. After getting down to the block, I can see that the motor is not in bad shape at all. Therefore, I want to keep the block stock and just build up the top end. Other than having a machinist port the stock heads, what else can I have done to increase horsepower? Possibly the intake ported?