Re: GT40P heads
Many people have argued over which gt-40 head is better, The P's have a smaller exhaust valve, but better angle on the plug to allow free flowing. And the non p head is a bigger exhaust valve, I like em better for the fact that they dont need a special header.
So i say get whatever one is cheapest at the time, I bought mine from a guy on a local stang website here in tx. good luck
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X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's.
race weight 3,160
12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear
13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear
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