The p's are not really more expensive than the regular iron 40's, the p's need a special header to clear the plugs because they have a different location, also a smaller exhaust valve on the p's, but they flow a little bit better then regular 40's due to the plug relocation, of course mine been ported anyway so they flow alright..... also the springs suc on the 40's, so upgrade them if you want some real power.
the injectors? you can stay with stock 19's for a good while, i just now upgraded mine to 24's, the 19's were pushing me in the 12's with no problem, start with a fuel pressure regulator if you dont have one.
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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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