Are your 461's X's?461's are basically cast iron copies of the 1960 aluminum fuelie heads which supposedly also had a 461 casting number,the X versions supposedly had ports with larger internal volumes making them the preferred casting for class racers according to magazine articles back in the day.
I'll be going through my heads here shortly for the guy up north. I'll get back to you.
Yes they do, I wish they would have cast them with the double humps though
. Just for the nostalgia.
Yes they do, I wish they would have cast them with the double humps though
I have had 291 292 461x 461 and 462s. I had a complete 63 fuelie out of a vette in a 61 once. Lots of work done from top to bottom changed to carb, 13 1/2 TRWs. It was awesome ran cheaters on it and when everything came together it would pull one wheel of the ground. Then the next time I tried I would break something, dumb kid!
Yes the Vortecs are pretty distinctive in an open engine compartment you can see them a mile away.Yes they do, I wish they would have cast them with the double humps though
I have had 291 292 461x 461 and 462s. I had a complete 63 fuelie out of a vette in a 61 once. Lots of work done from top to bottom changed to carb, 13 1/2 TRWs. It was awesome ran cheaters on it and when everything came together it would pull one wheel of the ground. Then the next time I tried I would break something, dumb kid!
461X heads have 172/64 cc runners and 461 have 165/65 runners according to the NHRA stock class sets. The 461X heads were used on 327 with 300-340 and 365hp with 1.94-1.50 valves, as X heads never had 2.02/1.60 stock. The 2.02-1.60 versions were the 165/65 setup. The X heads have 62.076cc chambers and the regular 461 are listed as 64cc. Some info lists them both as the same. But the X heads untouched have a quench pad that made the difference.
