I'd do the helicoil as once you hit water you have to deal with sealing issues and or possibly cracking later on! Plus staying iwth 3/8's means it all bolts up stock and is invisible. No reason you can't do it with the head in place on the block. -- Mark Price Morgantown, WV 1969 AMC Rambler, 4.0L, EFI, T-5 2004 Grand Cherokee Laredo, 4.7L, Quadratrc II " Chronic Pain Hurts" -------------- Original message ---------------------- From: "Michael Canada" <gcanada@xxxxxxxxx> > Hi guys I need a bit of advice for 401 V8. I was trying to put my alternator on > and found the bolt hole was stripped out, great time to find out. The head is on > the engine and in the car. My question is, should I just drill and tap the hole > out and install heli coils 3/8 or wound the head be able to take just being > tapped out to 7/16 bolt thread ? The hole is the one closest to the header > flange. > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://splatter.wps.com/pipermail/amc-list/attachments/20080810/277e8da6/attachm > ent.htm > _______________________________________________ > Amc-list mailing list > Amc-list@xxxxxxxxxxxx > http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list