any one put a c-4 in a 79-93 stang

[jays306LX]

i am having trouble with the darn cross member. i put in one way it wont line up with the slots on it. put it the way and it is to far back even when adjusted maybe its just me what am i doing wrong,

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84 lx coupe 75 truck block .030 over trw 10-1 pistons comp magnum 280h .512 .512 lift with 230 duration.. early casting heads 1.94 1.60 valves 58 cc chambers harland sharp rockers 1.6 air gap intake with mild porting holley 600 vac seconderies 2 inch open spacer. built man c-4 with PI 2800 sthall 8.8 strange spool 3.73's moser 31 spline still building the rest going for high to mid 11's