1980 Sierra C15 Junkyard L31 Vortec 350 Summit K1107 488 510 Cam Thrush Turbo Mufflers HD

My 1980 Sierra with the mufflers installed and spouts on finally. Mufflers are Thrush Turbos and the piping is 2-1/2" Flowtech headers. Summit reducers. Junkyard 350 with a Summit K1107 .488/.510 lift cam. Performer RPM intake. Thrush turbo mufflers. Flowtech headers. 600 Holley. Long block is as follows... Early 80s 4 bolt block from a 1 ton van with custom dremel ridge removal Original cast crankshaft from the same block 130K mile L31 pistons and rods. Factory rings as well. Fresh hone in cylinders 9.5:1 Compression Clevite bi-metal bearings New brass freeze plugs Stock 130k miles L31 oil pump with Melling driveshaft and new stock oil pan Stock junkyard Vortec heads with Crane springs. One 906 and one 062 New stock timing set Summit K1107 hydraulic flat tappet cam .488/.510 lift 292/302 adv duration 114 LSA Stock stamped steel 1.5 rockers Stock centerbolt valve covers