360 to 390

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Jul 18, 2010 | 02:42 PM

91B

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360 to 390

I plan on a complete rebuild of my engine and I was wondering if it turns out i have a 360 what would I have to do to make it a 390. Is it just a bore, and the heads? (aside from obviously getting the kit for a 390 so i can have the right pistons) Do i have to get a different crank? or rods?

thanks ford fans

Jul 18, 2010 | 02:44 PM

73FordF100

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From: Georgia

A 360 and a 390 have the same bore, different stroke. I believe the heads are the same but the crank and rods are different.

Jul 18, 2010 | 02:52 PM

montana_highboy

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From: Big Sky Country

Quote:

Originally Posted by 73FordF100

the crank and rods are different.

That's it, just the crank and rods.

Jul 18, 2010 | 02:54 PM

91B

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Right on, so i just get a 390 rebuilt kit, pull a crank and rods from a
390, have everything machined and im good to go? (well... a little more complicated, im sure, but thats the basic idea?)

Jul 18, 2010 | 03:23 PM

73FordF100

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From: Georgia

Pretty much. I haven't done it before, but I will when I rebuild my engine sometime in the future.

Jul 18, 2010 | 07:14 PM

mikeo0o0o0

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From: Stanley, VA

Quote:

Originally Posted by 91B

Right on, so i just get a 390 rebuilt kit, pull a crank and rods from a 390, have everything machined and im good to go? (well... a little more complicated, im sure, but thats the basic idea?)

That's pretty much right. The only difference between the 360 and 390 is the stroke. Everything else is the same. To do the conversion you'll need a 390 crankshaft (2U casting number) and the 390 connecting rods (C7AE-B casting number). The stroke on the 390 is 3.78" vs. 3.50" for the 360. The heads are the same on either engine.