Join Date: Feb 2009
Location: Largo, FL 33774
Your local GM dealer may have original bolts. There are a lot of BBs out there. The bolts for most of the BBs are the same throughout the production run. Pan bolts, head bolts, valve cover bolts, water pump bolts, intake manifold bolts, main bearing bolts, rod bolts, and exhaust manifold bolts. The only different bolts, and it may only be the number of bolts for the timing cover (I have a Gen VI, so I am not sure about Gen I, II, and III) should be the same. The cam gear bolts may be different.
The two piece main seal crank that came in the Gen I, II,and III is not compatible with the Gen V and Gen VI, and the oil pans and timing cover are different. The bolts for the oil pan should be the same. There is no Gen IV.
1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html