these are the service replacement heads. none ported not worked on and they where dated 74' just wondering what they may be worth. and i may bolt them on my 396ci. but just want an idea of value.

There are two very different styles of factory bb aluminum heads.

The L89 aluminum head interchanges with the cast-iron head used on 375/396 and 425/427 Camaros. It is a rectangular port closed chamber design.

The ZL-1 head does not directly interchange with any other head. The chief difference is the open chamber design requiring L-88 or ZL-1 pistons.

Which do you have?

these are the #3946074 round port exhaust heads

Don't buy those heads until they are pressure tested. The 074's were bad for porosity.For what those heads are selling for you can buy aftermarket alum heads that are far superior in everyway for less.