I DONT have aftermarket pistons, and run 1.7's on top of the e-cam, you'll be fine, i have some comp cams springs i bought without retainers, i'll have to look for the part# if you want it.
my stock retainers were smaller then the aftermarket's, but still run on the car today with no problems.
So i spent about 70$ on the springs, and gained some hp.
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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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