If you are just planning a long block swap then the only manditory thing you
need to do is to remove all the cast (freeze) plugs and replace them with
brass ones. The iron ones will rust out in short order if you do not. I
forget but there may be some in the rear behind the flywheel. The rear cam
plug does not need to be brass. The cam is different as well but that is
not as much of an issue. You can swap cams if you want but that's a bit
more work and you'll have to get a cam change gasket set. Sort of a chore
on chevys as you have to loosen the front of the oil pan to get the cam
chain cover off.

"eppinger" wrote in message
...

what do i have to change on a truck 4.3l motor to work for my boat?
the blocked cracked in my old 4.3l.

thanx
jamie




--
eppinger