From memory, the Gray Ghost ran towards the end of the '71 season with a tall deck 303. The main reason this was allowed was that the SCCA allowed dry sumps in '71. Probably for Penske/Donohoe Javelins which were eating engines due to oiling. The 303s have two oil pumps--stock pump is a scavenging pump and a second pump was added behind the cam which is the pressure pump.
The short deck 303 was attempted for the first races of the '70 season, but SCCA DQ'ed because of homologation. So a de-stroked 400 was run the rest of the season with disastrous results.
The "junk yard" Trans Am was prepared for the '72 season.
Generally for the races the 303 entered, it did quite well. Perhaps two or three DNFs over the 10-ish races the Adams' team entered.
**I am looking for documentation on the dry sump tank of the JY TA.
I suspect it was on the passenger floor, near the firewall for a few reasons:
1. Batteries had to be visible from the engine compartment in '70; so teams built a recessed box.
2. Batteries could be back in the trunk in '71. But that recessed box was there and a good spot for a newly allowed tank. Penske's is visible in pictures.
3. '71 SCCA rules specified that the tank had to be sealed from the driver; hot oil is not too fun.
Anyway, I would appreciate any thought you have.
Anyone have any pictures of the interior of the JY TA which shed light?
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