first off i would like to thank everybody for the advice on my engine install. i will use it. now for what seems to be endless problems, i have what i would call a very bad miss match from my aftermarket heads to my current headers which are 1 5/8 primary tubes. if the photos come out like i think they will you will be able to see what i'm talking about. the measurement on the head is quite a bit larger than the header opening which in the words of my racer friend would be unacceptable to him. the green gasket is a template i made of the head opening and is against the header and shows where the exhaust will be banging against the header opening before i ever get out of the driveway. the dial calipers show the measurements of both head and header. difference to me is a bunch. if anybody has a set of 1 3/4 primary tube headers sitting around maybe you could get a measurement and that could be the fix. i would like to use what i have but i also don't want to give up a lot of tq and hp before i ever get going. these are pro comp electronics cast iron with 1.94 and 1.50. nothing special,just new.