noise

[bcclew]

1976 silverton had crusaiders new 5.0s engs replaced with 350 long blocks mal dis edelbrock carbs engs run great. orig v drives and trans.changed oils this spring.took it out the other day ran fine.now im hearing a clunking sounds like v drive?felt down there and listen with a long screw driver hard to tell? forward or reverse doesnt mater.haveing said all that ijust wanted to give you a little history.i have been a boat mech for years. but dont get to work on in boards.do stern drives and outboards.oils still look new i dont see any metal.any help would be great thanks bcclew

 

[knuckle47]

Are these sounds coming from the bellhousing. Can only draw on my experience with a damaged damper flex plate attached as a coupler to the flywheel and trans. Check the diagram in the parts book

 

[makomark]

Sounds will travel thru the drive line metal very easily.

Like Knuckle, I'm thinking the flex plate, especially if the old one was re-used with the long blocks.