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Ed Wright · 01-05-2019, 01:42 PM

I was fortunate enough to find a local shop with a large inventory of cylinder head castings when I had my old C/SM car. Had to use production head castings, with very little porting allowed. Remember one inch below the seat?
I was able to locate five 461X castings. Of course picked the two my flow bench liked the best to start with. Seems like the "X" Intake ports were about 5cc larger?
The 5 #461X castings I found did also flow a little more on my home built bench than the regular 461 & 462 castings I had. A little more than those other castings normally varied. Even better after Lee Shepard laid his hands on them. I was more impressed with the X castings than Lee was. Think Lee knew more than me? LOL

01-05-2019, 01:42 PM	#6
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 389 Times in 168 Posts	Re: Chevy OE cranks, cyl. heads. I was fortunate enough to find a local shop with a large inventory of cylinder head castings when I had my old C/SM car. Had to use production head castings, with very little porting allowed. Remember one inch below the seat? I was able to locate five 461X castings. Of course picked the two my flow bench liked the best to start with. Seems like the "X" Intake ports were about 5cc larger? The 5 #461X castings I found did also flow a little more on my home built bench than the regular 461 & 462 castings I had. A little more than those other castings normally varied. Even better after Lee Shepard laid his hands on them. I was more impressed with the X castings than Lee was. Think Lee knew more than me? LOL __________________ Ed Wright 4156 SS/JA