Looks like a fun build my olds was lowered with 2" spindles and lowered rear springs what cross member you running in car, they make a double notched crossmember for these cars if your running headers allows you to clear exaust alot easier wasnt sure if you were that far yet looks like a fun build good luck,
Mine is an 84 cutlass with a 461 BB olds 390 gears 400 turbo keep us posted good luck !