New headers, Have Questions? Picture Heavy

[H-Rod]

Originally Posted by 1BIG67AC

H-Rod
The A&C instructions say to measure 22.5 inch back from the top front cross member and mark the frame at this point. This is where the middle of the two center header pipes line up on the frame. Then mark the holes on the frame using the frame mounts attached to the motor. This is what I’m worried about. If these header are ok to use this measurement. I want this motor mounted in the chassis. Should I go ahead and drill and mount motor mounts or not with these headers? If you look hard it the picture I attached shows that mark on the frame. Should I go ahead and drill and mount? Thoughts?

My money says you`ll be O.K.

Think about this, it doesn`t matter what tube orientation your headers have. (over, under, extreme bend, etc.) your exhaust ports on the head will never change location.
A&C wants you to use that location as a guide for their dimensions. (center of headers, center of the exhaust ports)

My concern would be the rear tubes (#7 & 8) possibly hitting the footbox.
That`s why I mentioned putting on the body to see what will/wont hit.

If you`re overly concerned about drilling holes in the frame to mount the engine, wait til you drill holes in the body for the rollbar.

[1BIG67AC]

Well I’ll go with theses headers. Ill mount and drill the motor mounts to the frame, put the body on and see how close the foot wells are to the rear pipes. Ill let you now how it turns out. Finger crossed. Thanks for all of your input on this issue.

[Racerbill]

This is my first post. I have been building an A&C for a few months now. I used the 22 1/2 measurement and the headers didn't line up where they were supposed to. I am using s 351c. Dimensionally, the headers should wind up in the same place as a 302 or 351w. I found I needed to move the engine back 2" for the headers to exit properly. You need to set the body before you mount the engine. I have my body hanging from the ceiling so it's easy to take off and put back on again.