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Adger Smith · 11-07-2009, 11:29 PM

A quick trip to Mortec and it says:

3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head
3947041X...69-70...302/350......"Right angle" casting identifier, 64cc chamber, 165cc intake port, accessory holes, good HP head

I woud look at all the engines of these years in the NHRA Blueprint specs to get which hp engine/car combo they are approved for. I know thats not a quick and easy answer, but it will help narrow your search.

11-07-2009, 11:29 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: 041 cyl heads A quick trip to Mortec and it says: 3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head 3947041X...69-70...302/350......"Right angle" casting identifier, 64cc chamber, 165cc intake port, accessory holes, good HP head I woud look at all the engines of these years in the NHRA Blueprint specs to get which hp engine/car combo they are approved for. I know thats not a quick and easy answer, but it will help narrow your search. __________________ Adger Smith (Former SS)