e6te to e7te head swap
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1st Gear
Joined: Feb 2024
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e6te to e7te head swap
im currently rebuilding the 302 non roller non ho efi motor out of my gfs truck and im trying to swap the e6te heads to a set of e7te heads to try to get whatever power i can out of it with a cam swap and head swap. all the info im looking for is never in any of the forums and every thread kinda skirts around the answer im looking for. my question is will the e7te swap over and will i need to buy new rockers for the e7's since they dont have any on it or can i use the e6 rocker arms. i considered buying new rockers but im not sure which to get. the motor came with valve relief pistons which im finding is not normal according to every thread i find. no i dont have the money or ability to switch to a newer motor right now and i dont understand computers that well so im not switching it to maf. i ordered new piston heads from summit as my pistons were fubar. but it does not say the depth of the valve reliefs on them. i want to know what the clearence is on the e7 heads with valve relief pistons( these are the ones i bought https://www.summitracing.com/parts/SUM-17302C-00 ) so i know which cam to buy which is already a small selection as it is becuase of the sd efi system. also will the stock intake manifold work with the e7s or is there a swap in replacement that will work with the rest of the system
Last edited by Bryant B; Feb 6, 2024 at 05:09 PM.
Cargo Master
Joined: Sep 2006
Posts: 2,120
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From: Evansville, Indiana
@Bryant B
E7TE heads will fit just as the current heads do. About the current heads... There is no E6TE head. Some late '86 trucks may have had E6SE heads but the pistons with those heads would be flat tops. If you have a '85-86 efi truck engine with valve recessed pistons, the engine is most certainly equipped with E5TE heads.
Without doing any research I'd still bet that those Summit pistons would accept any cam that is acceptable to the stock SD EFI. Probably even much higher lift cams.
The pedestal rocker arms are all the same for any head of this era.
If you intend to use the stock efi with its original ECM do yourself a favor and stick with a stock cam.
I rebuilt a 5.0 and used E7TE heads and a roller cam set up from a late eighties passenger car. The roller cam in many of those cars was nearly identical to your 1986 truck's stock cam. The main benefit of using the roller set up is the lifters can all be reused and there is little to no chance of wiping a new flat tappet cam during initial break-in.
My truck's August 1985 cast block had been manufactured roller ready.
E7TE heads will fit just as the current heads do. About the current heads... There is no E6TE head. Some late '86 trucks may have had E6SE heads but the pistons with those heads would be flat tops. If you have a '85-86 efi truck engine with valve recessed pistons, the engine is most certainly equipped with E5TE heads.
Without doing any research I'd still bet that those Summit pistons would accept any cam that is acceptable to the stock SD EFI. Probably even much higher lift cams.
The pedestal rocker arms are all the same for any head of this era.
If you intend to use the stock efi with its original ECM do yourself a favor and stick with a stock cam.
I rebuilt a 5.0 and used E7TE heads and a roller cam set up from a late eighties passenger car. The roller cam in many of those cars was nearly identical to your 1986 truck's stock cam. The main benefit of using the roller set up is the lifters can all be reused and there is little to no chance of wiping a new flat tappet cam during initial break-in.
My truck's August 1985 cast block had been manufactured roller ready.
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