Marine engine rebuild

[FishingNYS]

Any recommendations for a 1970 gm L6 250 rebuild? Motor just started knocking. Wasn't from low oil.  

[Bozeman Bob]

MichiganMotorz , has the rebuilt L6 for 2899.00 . Probably the cheapest and quickest drop in replacement.  A local engine shop might be another option , they are usually busy now ,car racing season, so be prepared to wait if you go that route . 

[rolmops]

They usually have long blocks laying around as well.