less than 30 miles on these.
170cc intake runners
76cc chambers
2.02-1.6 valves
Z/28 springs 1.25 OD, 550 lift
crane roller tip rockers with 1.5 ratio
decided to goto different setup need $300, will split shipping.
also have a set of edelbrock performer rpm valve springs with retainers and keepers for $80

What engine are these designed for?

gen1 57-86