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Danny Ashley · 01-25-2015, 08:12 PM

That chart is wrong concerning the 77 Cat wagon. A 2 seater falls at 15.72 and a 3 seater 15.78 .Both natural O cars. Minimum O weight with driver is 4070. The 2 door Cat falls at 13.85 natural L car. 13.5 X 260=3510 + 170=3680. K would be 13 x 260=3380+170=3550. a difference of 130 lbs. M would be 14 x 260=3640 + 170=3810. which is 130 lbs above your natural L weight. Use the NHRA classification guide instead of those charts and you won't go wrong.

01-25-2015, 08:12 PM	#10
Danny Ashley Member Join Date: Nov 2001 Location: Marion,In. Posts: 267 Likes: 60 Liked 110 Times in 29 Posts	Re: Ol' Fart's Firebird Fantasy That chart is wrong concerning the 77 Cat wagon. A 2 seater falls at 15.72 and a 3 seater 15.78 .Both natural O cars. Minimum O weight with driver is 4070. The 2 door Cat falls at 13.85 natural L car. 13.5 X 260=3510 + 170=3680. K would be 13 x 260=3380+170=3550. a difference of 130 lbs. M would be 14 x 260=3640 + 170=3810. which is 130 lbs above your natural L weight. Use the NHRA classification guide instead of those charts and you won't go wrong. Last edited by Danny Ashley; 01-25-2015 at 08:18 PM.