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

Travis Miller · 10-25-2016, 10:05 PM

I checked one of my old NHRA Redbook Classguides and found a page for the 1963 Pontiac dated 1973. The top 421 shown is the 370 horsepower even back then.

10-25-2016, 10:05 PM	#2
Travis Miller Member Join Date: Jun 2007 Posts: 478 Likes: 1 Liked 276 Times in 27 Posts	Re: Why No 421 Super Duty in current NHRA Guide? I checked one of my old NHRA Redbook Classguides and found a page for the 1963 Pontiac dated 1973. The top 421 shown is the 370 horsepower even back then.