I like the idea of the 380, the problem is, and I probably didn't make it clear up above, is I don't have a 390 crank. Unless there is one in the 360 block...

I have a question about the dowel rod.

I'm guessing, the dowel rod suggestion would be to pull a plug and stick a dowel down the plug hole and measure how far down to Bottom dead center... So, how far would the dowel go down on a 390 compared to a 352... Or maybe I'm over thinking the dowel rod suggestion.

Please explain if you have a minute.

Thanks,
Joel