Pontiac production records for the 1973 model year reveal that one A-car was assembled with the Super Duty 455. Its disposition and/or whereabouts have remained unknown for 50 years. Its engine had been saved from being salvaged by a former GM engineer in the mid-1980s and its significance was recently uncovered. Here’s how!
SD-455
The Illusive Super Duty 455 308/320 “K” Camshaft
SD-455, Pontiac20 CommentsMost Pontiac enthusiasts are aware that Pontiac planned to equip its Super Duty 455 with a 308/320-spec camshaft, but emissions regulations forced the division to go with the 301/313 grind for production. Have you ever seen an original SD-455 308/320 camshaft? Well, here’s your chance!
How A "Piece" of Mac McKellar And Pontiac History Found Me...
Pontiac, personal story, SD-4555 CommentsI find Pontiac’s 1973 Press Preview among the Division’s most interesting events ever. It’s there that the Super Duty 455 was introduced the motoring world. A performance bombshell while others were shying away from it, every magazine writer in attendance that reported their take on the SD-455 in their respective publications. Mac McKellar—arguably Pontiac’s most famous engineer and a man I greatly admire—was at there that day and I was recently gifted his personal nametag.
Guide Lamp's '74 Super Duty Trans Am
SD-455, personal story3 CommentsThis ‘74 Super Duty Trans Am was in GM’s Product Evaluation Program at the Guide Lamp Division before being sold to its first owner. Here’s that story…and its documentation!