You'll still do really good with the 1-7/8" headers. These exhaust systems have to be all custom installed so they fit properly. I had my Son help me with ours as he's a welder. I did both cars at the time with all 3" mandrel and full 3" Trans am tips. Came out beautiful. There was lots of fabricating to get the tips installed with 3" though. Wish you were closer as I'd love to help with exhaust. It's a fun project in my opinion. Work of art when done.
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68 Firebird. IA2 block, 505 cu in, E-head, Solid roller 3650 weight. Reid TH400 4:11 gear. 29" slick.
Best so far 10.12@133 mph. 1.43 60 ft.
76 Trans am, TKX .81 o/d, 3.73 Moser rearend,
468 with KRE D-ports, Doug headers, 3" Exh.
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