360-390 swap balancing question

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Aug 25, 2011 | 05:08 PM

1984 F-150

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From: norrthwest PA

360-390 swap balancing question

ok im sorry but i have myself so confused, if i turn my 360 into a 390 is the interls already balanced, or does the 390 crank rods and pistons need re balanced since it is internally ballanced.?

Aug 25, 2011 | 09:30 PM

tater_51

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As long as you haven't changed anything out like new pistons, a change in rods etc., and everything in the rotating assembly has been kept together you should be good to go.

Aug 25, 2011 | 10:46 PM

Bear 45/70

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From: Union, Washington

Quote:

Originally Posted by tater_51

As long as you haven't changed anything out like new pistons, a change in rods etc., and everything in the rotating assembly has been kept together you should be good to go.

Doesn't matter if he did change pistons, rods, etc; both the 360 and 390 a zero balanced . So there will not be any balance issues.