are the stock manifolds for late model mustangs (86-93) a larger diametor than the stock s on the marks. reason i'm asking is i am planning on getting a set of gt-40 heads and will be burchasing some bbk shorty headers alog with them, but thats a little ways off. in the mean time i was thinking of just grabbing some off a stang in the junk yard for the time being(that is if they are infact larger) anyone have thought on this.

'86-'93 'stang headers are all the same as the '86-'92 Mark VII headers.
Assuming you have the LSC or later model Bill Blass which already has headers.

'86-'93 'stang headers are all the same as the '86-'92 Mark VII headers.
Assuming you have the LSC or later model Bill Blass which already has headers.

thanks for the info buddy.