How far should I go on my npi/pi swap?

PinkieT

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Ok, I've assembled parts for years now but my back is preventing me physically and retirement is restricting me financially from doing my full PI swap plan on my 98 GT by myself. So far it has a BBK CAI and an Accufab plenum with larger than stock throttle body I installed. In the garage I have a set of PI heads with cams nabbed cheap from Summit's discount area - they are either brand new or fresh rebuilds - and an extra set of used PI cams picked up for a good price. I have a PI intake, a set of BBK shorty equal length headers, 2.5" H-pipe with high flow cats, and a used Flowmaster cat back. I have a cherry picker and plenty of jack stands but no lift. My plan was to drop the engine on the k-frame, take the engine to a shop to do the head and intake swap, install the BBKs, put the engine back on the K-frame, put it back in the car, and then do the exhaust. The minimum I'm going to do is leave the engine in the car and do the PI intake swap (which I can probably tackle myself) and pay for headers to tailpipe exhaust work. I figure that may cost me $500 to $800. Next step is paying somebody to swap the PI cams into my low mileage car, or pay somebody large coin to do the whole head swap. If I go low, I can sell the heads and cams for some good money. How much extra power will I get from the cam upgrade vs. the money involved, and the head swap vs. the money involved? At this point I'm thinking go cheap and do just the intake and exhaust, but change my mind. BTW the car is a cruiser, not a racer.
 

07GtS197

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Cams and intake net the biggest gains. Pi heads do flow better but IMO it’s a lot more work for not much more gain. And it will increase compression. Also it’ll limit your cam choices due to the npi pistons.
 

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