Why No 421 Super Duty in current NHRA Guide?

DeuceCoupe · 10-22-2016, 06:52 PM

I'm looking at the NHRA Classification Guide online. For 1962, they spec the 421/405 Super Duty Cat, both all steel and with aluminum (3728 and 3633 lbs). Ok.

But for 1963 Pontiac, there is nothing listed for any 421/405 or 421/410. I know a few of the cars (14) were Swiss Cheese and those were A/FX or B/FX only. But there were about 74 Super Duty cars, some steel, some aluminum. Why wouldn't these be listed in the guide? It stops with the 421/370ho. Wouldn't a 421/405 be legal for stock class, at least all steel or maybe even with aluminum?

If 74 cars isn't enough, then how come in 1964 the 63-Z11 (57 cars) and 64-Galaxie.Hi.Riser (50 cars) were legal in AA/S?

Then again I looked for somebody who ran a 63 Super Duty in Stock back in the day and cant find any. All the old stuff is either Swiss Cheese et/mph, or S/S or A/S in AHRA, but nobody in NHRA.

10-22-2016, 06:52 PM	#1
DeuceCoupe Member Join Date: Feb 2016 Posts: 267 Likes: 96 Liked 45 Times in 41 Posts	Why No 421 Super Duty in current NHRA Guide? I'm looking at the NHRA Classification Guide online. For 1962, they spec the 421/405 Super Duty Cat, both all steel and with aluminum (3728 and 3633 lbs). Ok. But for 1963 Pontiac, there is nothing listed for any 421/405 or 421/410. I know a few of the cars (14) were Swiss Cheese and those were A/FX or B/FX only. But there were about 74 Super Duty cars, some steel, some aluminum. Why wouldn't these be listed in the guide? It stops with the 421/370ho. Wouldn't a 421/405 be legal for stock class, at least all steel or maybe even with aluminum? If 74 cars isn't enough, then how come in 1964 the 63-Z11 (57 cars) and 64-Galaxie.Hi.Riser (50 cars) were legal in AA/S? Then again I looked for somebody who ran a 63 Super Duty in Stock back in the day and cant find any. All the old stuff is either Swiss Cheese et/mph, or S/S or A/S in AHRA, but nobody in NHRA.