Stock G Body Exhaust Manifolds For El Camino or Monte Carlo

[ElCamMan515]

Hey Guys i need some information! i am trying to order some Pypes down pipes for my El Camino, but do not have the stock Exhaust manifolds that came with my el camino as the motor that i took out of my car was not the orginal 305 it was a 307. i am in need of the bolt circle size for the stock manifold with a 3 bolt flange. i have exhuast manifolds on my motor now, but after calling Pypes to get information on the bolt circle of the flange that comes with the kit, they said they did not know what size it was and basically told me they were not interested in finding out for me. so i am asking you guys if you have any stock g body exhuast manifolds laying around or on your car for SBC Chevy G Body could you please tell me what size bolt circle the 3 bolt flange is. Thanks in advance guys! I Need The information so i can finally get El Camino going once again! Thanks -- El!