[Ron61]

A 427 Low Riser was one with the low rise intake and the heads and other stuff flowed less than the Medium and High Riser ones did. I had a 427 Tunnel Port with two Holly Carbs that you could stand in and it was a high riser that stuck so far up I couldn't use a hood without cutting a long hole in it and then either having a metal scoop made or just leaving the air cleaners out in the open. I only kept it a short while and got rid of it as it was just not drivable on the street. The Medium riser came in between the High Rise and Low Rise intakes. Ports are a little different in them too. As FFR428 said, they are good heads but not the best performance ones.

Ron