Im Swapping a 350 from my 305.. Im running headers and im not worried about the emmisons (cat) Should I just run the headers to a Y pipe and then shoot them into a flowmaster.. or just Make some Straight pipes out the back> what should i do?

 

What headers? How much do you expect to be able to do yourself? How much can you afford to have done custom?

The cheapest, do-it-yourself route would be to get headers w/y-pipe, full cat-back, and put a pipe where the cat is supposed to go.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4 (restalled TC). Ported World 305 heads, Crane PowerMax cam. ZZ4 intake, oil pump, pan & baffle. Accel HEI SuperCoil & module. Hooker 2055 headers, 3" Catco cat & 3" catback w/dual-opposite Flowmaster. 2.93 limited slip, Spohn SFCs. AMSOIL syn lubes bumper-to-bumper. Daily year-round driver. Best ET, speed TBD...
57 Bel Air, my 1st car. '66 396, 9.7:1 forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 700 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

i've personally ran headers straight through to a flowmaster,it sounded pretty good.Ofcourse i had the tES headers from edelbrock which came with a y pipe and was made to bolt right up.The emmisions tubes on the headers i just blocked off.Unless you plan on getting an exhaust shop to custom bend you a y pipe ect.Try to find a direct bolt up header set up.As far as straight pipes,Imo it doesn't sound that good.I though it sounded too much like a truck coming down the road.