I am building a motor to put in my CRX . This block has Je Pistons Carillo rods re-sleeved ,solid deck arp head studs. I am now thinking if i should buy the GREDDY E-MANAGE or the high price HALTECH?????? The block remain with its 81mm bore 9:1 CR.i want to get a Z10 block girdle, Does any of you guys used this before??? Also a prodrive oil pump gears. my goal is 450 BHP i have a T3TO4E to help me get there.