I'm no authority but from all accounts I've read and heard, a backwards swap to multiple carburetion and an earlier camshaft were never a part of any "Royal Bobcat Package". Performance upgrades are intended to improve performance, not lessen it and while both pieces you possess are nice nostalgia parts, they would not have been considered performance upgrades by a shop as sophisticated as Royal Pontiac.
Here's a 1970 Car and Driver article describing exactly what Jerry said earlier. GM did not allow a motor larger than 400cid to be installed in the intermediate GTO. 428 crate motors were swapped in by Royal Pontiac which would have been SR engines purchased from Pontiac. Whether these engines would have been VIN stamped for the cars that received them is doubtful as they already carried an SR designation and identifiable as not original to the car.
https://www.caranddriver.com/reviews...d-test-review/
According to the following article, The only engine-less cars shipped to Royal Pontiac were the 428CID RA V GTO Bobcat. They were not consigned but sold directly to Royal as original owner, and came less engine along with an ala carte 428 RA V crate engine.
https://www.streetmusclemag.com/news...gto-ram-air-v/
Good read here on the depth of the Royal Pontiac Bobcat mods.
https://www.hagerty.com/media/car-pr...royal-pontiac/ It documents 3 levels of "Bobcat Packages" available mail order (parts only) or installed by Royal Pontiac.
1) Distributor re-curve kit w. Mallory points & condensor
Carburetor jetting optimization
Shim head gaskets to raise compression
2) Cylinder head blueprint in conjunction with 1)
3) Full NHRA C/Stock preparation (on 400 CID equipped cars)
In any case, a tripower retrofit does not appear to have been a part of the "Bobcat Package" for a 400 or 428.
Under NHRA C/Stock rules, an earlier tripower installation would have been disallowed along with the 428CID transplant as neither would have met the showroom stock criteria of the NHRA nor does it appear to have been a part of any documented Royal Bobcat package.