CLASS RACER FORUM - View Single Post - Why No 421 Super Duty in current NHRA Guide?

DeuceCoupe · 10-02-2021, 10:44 PM

1963 Cat Ragtop
3833/313=12.25 for E/SA=12.00 class in 1965

Lumley & Shaw set the E/SA record at 13.89 in May 1965 at Amarillo.

It took me a while to figure out that the
389/313-6v
389/315-6v
389/318-6v
are all the same engine, just slightly different compression.

10-02-2021, 10:44 PM	#14
DeuceCoupe Member Join Date: Feb 2016 Posts: 267 Likes: 96 Liked 45 Times in 41 Posts	Re: Why No 421 Super Duty in current NHRA Guide? 1963 Cat Ragtop 3833/313=12.25 for E/SA=12.00 class in 1965 Lumley & Shaw set the E/SA record at 13.89 in May 1965 at Amarillo. It took me a while to figure out that the 389/313-6v 389/315-6v 389/318-6v are all the same engine, just slightly different compression.