fe360 fe390 head swap

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Mar 1, 2013 | 09:27 PM

muddhogg

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fe360 fe390 head swap

can i replace my 360 heads with 390 performance heads? if so do i need to do anything else?it was bored .30 over with a mild cam -pushrods 750cfm deamon carb-gear drive timeing-headers and soforth.someone told me its just bolt on power.its a 76 f150 .thanks for any advice.ps it only has about 80 or 90 miles on new build

Mar 1, 2013 | 09:40 PM

cb_13

Fleet Mechanic

Joined: Jul 2010

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From: St James, Missouri

You posted this in the 04-08 forum. I'm sure one of our fine moderators can move it to a forum where you could receive better advice. I know we have a few guys that post in the Missouri forum that know those engines like the backs of their hands and would be glad to help.

Mar 1, 2013 | 10:58 PM

Stewart_H

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Joined: May 2004

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From: Central Coast of CA

Quote:

Originally Posted by cb_13

I got it covered.

Moved to the FE & FT Big Block forum.

Stewart

Mar 1, 2013 | 11:07 PM

85e150

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Quote:

Originally Posted by muddhogg

So you put stock 360 pistons back in it? Down the hole with 8.2 compression? Did you upgrade your valve springs?

The only "390 performance head" that would do you much good with be a 1960 offering with smaller combustion chambers. Good luck finding those. Otherwise, some other 1960s head have slightly small chambers, and some have bigger valves, but larger chambers.

FE Cylinder Head I.D. and Application Chart

Pull your crank and rods and replace with a 390 crank and rods with those new 360 speck pistons, and you'll have about 9.5 compression and some quench in your combustion chambers.