Originally Posted by WDCreech
Pontiac, having had block failures, went back to the #488986 block in early 1977, I believe.
Creech, I want to make sure I read this right. Do you mean Pontiac dealerships\service centers saw block #557 failures in stock engines? Or were these #557 blocks hot rodded up then failed?
HP numbers back in 77 was pretty low for a stock 400 block I believe 220 hp or so.