My 1969 Mach 1 started life as a 351 automatic. Body was pretty straight when I bought it. The body was stripped, drip mouldings shaved, new door skins installed and painted black. The bolt on hood scoop was replaced with a factory shaker and painted in the original "flat black" theme.
The deluxe factory interior was left fairly stock. I added a full factory gauge cluster with factory tach. The stock seats were redone with larger bolsters, new headliner, carpet and trim pieces.
The stock 351w was rebuilt with Eagle crank, Crower rods, Wiseco pistons, COMP Cams camshaft, Canton road race pan, Edelbrock Victor heads that were CNC ported then hand finished. The Victor Jr. intake was also port matched and topped off with a 750 Speed Demon. This combo made 547hp.