Magnum Head Clearance

[DartDad Too]

I am putting magnum heads on my 318. I know that I need to grind clearance for the push rods but need to know how much to take out and where are the critical areas. Will the lift on the cam make a differance?

 

[dgc333]

Grind Clearence? I have magnum heads on my 360. The area that the push rods come up through is almost big enough to fish the litters through. I can't see how there would ever be a clearance issue.

 

[1wild&crazyguy]

To be more clearer than others...
It's the other way around, when the LA head go's on the roller/magnum block that you need to open the push rod holes [if you still want to run the roller cam], if no roller cam then you have to do nothing in that area.

 

[DartDad Too]

Thanks for the feedback.
I just cleaned up the rough areas in the casting and called it good.
I'm working on 68 318 with a stock bottom end, Hughes Engine "Whiplash" cam and Edelbrock Airgap intake.
Is there any other things to look for while doing this conversion?

 

[fishy68]

Is there any other things to look for while doing this conversion?

make sure to use hollow push rods so it'll get oil to the rocker arms.

 

[1wild&crazyguy]

and the amc/mopar hyd oil through lifters.

 

[DartDad Too]

Already have both.