You were going to flow unported gt irons 
Well, mine are ported, and im still not all that happy with them, although my car makes decent power, i just thought id see a bigger improvement.
about the valve, i would just buy avalve for a 93-95 cobra, make sure the locks and reatiners are for gt-40's, cuz it seems they have weird retainers or something.
hope you fix it.
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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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