Is it wise to replace head bolts, bigend and crankshaft bolts when rebuilding a blacktop engine.

Defo head bolts, not sure about the others, BUT, I would go for a set of ARP ones for peace of mind.

Any stretch to yeild bolts will need to be replaced.

head and con-rods

If you go to town and do a full rebuild you will be looking at the thick end of £600.

New engines can be had for not much more.

Dave,
A blacktop with loads of life can be picked up for less than 150 notes if your canny with the dough. Why go to the trouble of a rebuild? Get one jazz up the paint job and slam it in. If it's shite (unlikely) then another 150 smackers... Scary rebuild talk costs big cahunas in comparison.

IMHO

Yer man JC