Double Hump 450

Adger Smith · 12-29-2007, 09:53 PM

I took a little trip through the Mortec site, http://www.mortec.com/castnum.htm & found:
1. 12506450...87-95...350
2. 376450.....75-81...262/267/305..6 or 7 exhaust bolt holes, 60cc chamber
On the NHRA site with the SS cyl head port vol. it lists the 450 head as a 168 cc intake & 60 cc ex port
The date codes are usually the month first & the day & year next. Like A 23 7 Jan 23 1977 0r 1967 or 1987 You have to know alittle about the decade the head was used in.
Hope this helps you.

12-29-2007, 09:53 PM	#3
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Double Hump 450 I took a little trip through the Mortec site, http://www.mortec.com/castnum.htm & found: 1. 12506450...87-95...350 2. 376450.....75-81...262/267/305..6 or 7 exhaust bolt holes, 60cc chamber On the NHRA site with the SS cyl head port vol. it lists the 450 head as a 168 cc intake & 60 cc ex port The date codes are usually the month first & the day & year next. Like A 23 7 Jan 23 1977 0r 1967 or 1987 You have to know alittle about the decade the head was used in. Hope this helps you. __________________ Adger Smith (Former SS)