Decided to give one of these "unbuildable" kits a try (if the results are bad I can always blame the kit, right?
I had decided on a 10th Anniversary package as far as the color, the automatic shifter in the interior bucket gave me the idea of doing something different for the powertrain. In '79 there were a few Pontiac 400s available but they were generally reserved for 4-speed cars, the majority had a Turbo 350 automatic trans coupled to a 403 Oldsmobile.
The trans came from an MPC 78-82 Vette with the bellhousing changed from the Chevy to the BOP pattern by blending in the top of the manual trans bellhousing from the AMT '69 442 kit that was supplying the engine. It seemed the big block from the 442 kit could be a convincing small block if buried under a shaker scoop and miles of hoses like the original. All small block Oldsmobiles from '72 and up use the "single exhaust" manifolds- the passenger side has two flanges, one for a small diameter crossover pipe, the other hooked to the exhaust system (cars with real factory duals had the "extra" outlet blocked off). Liked the A/C compressor clutch detail of the MPC Vette belts so robbed some and used them with an R6 style compressor that was made up "quick and dirty" from some scraps, used the other sections to "rearrange" the engine accessories to more proper locations
Next step is to make a convincing firewall by making a decent "case" for the AC evaporator and heater, in this case the lack of detail in the original parts may actually be a plus. Need to search the parts box for a decent brake booster and master cylinder, extend the wheelwells to to the fenders, build up the fender flanges and hood hinge area as well as "fill" the core support and I think the horrible underhood area of the kit can be improved greatly
Even the horrible wheels and tires seem decent with a slight thinning of the rim and tire swap