Mercruiser 470 repower 1978

[surchin]

Hey guys
From california here,

After chasing years of intermittent overheat problems it seems I have a bad head gasket as I'm still losing coolant after running about 5 min now.

So I plan to repower as the boat trailer and transom and outdrive are all good. I've searched old forums but have not found a good thread of someone replacing a 470 with a new motor.

Any advice is appreciated there must be a bunch of these thst have been done. What works and what doesn't?
Thanks much.
Scott