they still pealed off a few SD 455's in late '74 early '75 .. you just had to know the right people at the right dealer .(Some Factory , some dealer done, COPO type order )
its a K4 code , Nov '74 carb btw .. the car was totalled in '81 and became a Funeral sale. I had the 2 piece intake also , but it ended up on the "Wall of Shame" after I granaded it ,also 1st and only pont block that I split the whole mainline in front to rear .
Now remember some parts were still ran off for the following 2 yrs for factory replacements ... '69 RA4 carbs sometimes are dated up into '76 .
here in the NW, Central Pontiac did more $$$ in sales out there back door, then the showroom could out the front .
we had TA's,firebirds,astro's with inboarded leaf springs ,455sd/ho engines ,cross ram intakes,headers,rockcrushers, 4.33 thru 4.88 gears ... hell I even saw a acid dipped Formula Body befor it became a feared bracket car.... They had the pull to order anything from/outta the factory , Plus a huge wealth of the skunk works type parts.
Ever see a bigblock 72-73 camaro ? We had 5 of them slip outta the dealership up here.. (Ive seen 3 of them personally)
BTW : I'm doing the Amps/effects 1st . There easy to replace ... Its the JP custom black beauty with the low #er thats gonna be a ruff one ... only as a last last last resort or as loan collat if I'm short (I'd rather not Owe )