Boss Block and Stock Heads

FireSale · 02-23-2018, 07:37 PM

I had access to 68 J Code heads for $100 and this undid it. Can't blame Ford, though. They make it clear in the Product listing on the Ford Performance Parts website:

"Designed for M-6049-X306//X307/C3/D3/Z304DA cylinder heads. Not designed for production 302/351W or M-6049-Y302/Y303/X302/X303/X304/X305 cylinder heads"

That block worked OK on AFR 1399 heads with gaskets made for the 6010 block. They are GT40 castings. Gaskets must be straight on the exhaust side to keep the water where it's supposed to be. I'm switching classes with n351 iron heads and double checked with Mike Delahanty first. Used to be director of Ford Short Track Racing, so he knew the head.Got an answer lickety split! Rely on your peers.

Looks OK so far.

Don't go all BowTie on us, now...

James: Good luck and have fun. Hope to see you in the combo this year - SS/CS.

02-23-2018, 07:37 PM	#12
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 237 Times in 126 Posts	Re: Boss Block and Stock Heads I had access to 68 J Code heads for $100 and this undid it. Can't blame Ford, though. They make it clear in the Product listing on the Ford Performance Parts website: "Designed for M-6049-X306//X307/C3/D3/Z304DA cylinder heads. Not designed for production 302/351W or M-6049-Y302/Y303/X302/X303/X304/X305 cylinder heads" That block worked OK on AFR 1399 heads with gaskets made for the 6010 block. They are GT40 castings. Gaskets must be straight on the exhaust side to keep the water where it's supposed to be. I'm switching classes with n351 iron heads and double checked with Mike Delahanty first. Used to be director of Ford Short Track Racing, so he knew the head.Got an answer lickety split! Rely on your peers. Looks OK so far. Don't go all BowTie on us, now... James: Good luck and have fun. Hope to see you in the combo this year - SS/CS. __________________ Dale Shearon 68 Mustang 6394