evidence of valve float??
Uhh, my car runs strong, but around 5500 rpm's it just falls on it's face, kinda flatlines? i have the stock gt-40 springs, im assuming they are having a problem keeping the lifter in check. 
my question is, i read that alot of people here have used the crane 44308-1, is that a good replacement?
2nd ?: i will need to install these with the heads on the car, so i know i will have to use compressed air, or the string trick, but where can i get a spring tool? and how do i check installed height? can i get the tool from parts store? i do have machine shop connections, but would rather keep the heads on the car since its a daily driver...thanx, id like to see my tach reach 5900 rpm without floating a vale into a piston 
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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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