MAC 1 5/8" equal shorty headers

I know this question has been beat to death, but I can't seem to find a true answer. I have a nice pair of coated MAC 1 5/8" equal shorty headers that came with my new coupe. I would like to upgrade the heads to GT40p's. Is there anyone here running this combo that can give me feedback.

This is a budget 300rwhp build for now and I would like to keeo the cost down. I plan on AFR's and a boosted 331 down the road. I just need a quick fix for the next year or so.

And if someone has a nice pair of GT40 or Gt40P's let me know; I'll buy them.

Thanks, Will

Thanks for the info +1 for GT40's. Your engine combo looks close to what I'm doing; do you have any 1/4 times with your car?