Side note on factory dual exhaust on GM Truck/Van units.
Any vehicle receiving the Diesel V8 got factory dual exhaust. Including G Vans. P Vans, and Cutaway chassis units as well.
My Canadian built 1983 Gas 305 V8 had tubular manifolds and catless true duals from GM.
Last edited by 1983 G20 Van; November 03rd 2023 1:44 pm.
1983 G20 Conversion Van, 350 TPI, Reed Hydraulic Roller cam, Ported 906 Vortec, Edelbrock 3817 TPI-Vortec Base, Doug Thorley Tri-Ys, Dual 2 1/2" exhaust, Speed Density 7730 ECM tuned by ME, 700r4 by ME, Stock 1,600 rpm converter, Rebuilt Stock 10 bolt with posi by ME, 3.08 gears, 358 RWHP @ 5,200, 384 RWTQ @ 3,400, 14.66 @ 95.43 w 2.28s 60'