[sjdiesel]

Yes swapping to edelbrock round ports

[ID67goat]

The reviews on Summit aren't so great.

The Doug's I have fit great on my car, but I purchased them over 10 years ago before Doug's was acquired by Pertronix. I wonder if the quality has changed for the worse over the years?

[67ramair4]

I've ran these since 1974, nice fit! I did cut the flanges at the heads to allow easier bolt fitment. If using a regular size oil filter, you have to remove the header completely! Flange bolts and at the head, otherwise you can't remove the filter. It's a mess!
Also, have to move the brake valve that's on the driver's side part of the frame. Install the headers from the bottom, won't go in from the top.

[66sprint6]

Some people have mentioned banging on them a little to make them fit. The Doug's or the cheaper ones on ebay are your only options anyway. It appears that Ram Air Restorations will likely never have the round port manifolds in stock to fit a pre-'68 car.
I'm not sure of the previous installations, but I'm wondering what size primary tubes they had before. A big problem in my mind is the 1 7/8" primary's.

[sjdiesel]

Originally Posted by 67ramair4

I've ran these since 1974, nice fit! I did cut the flanges at the heads to allow easier bolt fitment. If using a regular size oil filter, you have to remove the header completely! Flange bolts and at the head, otherwise you can't remove the filter. It's a mess!
Also, have to move the brake valve that's on the driver's side part of the frame. Install the headers from the bottom, won't go in from the top.

Same set since 1974? I do wonder how the fit has changed over the years.
I don’t like that about the oil filter…. I have read some similar issues. Should I do a remote oil filter?
Funny you mention the brake distribution block. I have the motor out of the car now and was thinking about moving that thing anyways because of heat.

Summit reviews are hit or miss which make me nervous. I just don’t know of a better header out there