[Sizzler]

I don't know why you care about the intake ports on the head.

"Low-riser", "Medium-riser", "High-riser" all pertain more to the intake than the heads and describe the angle of the runner between the head and carb flange.

Low riser's had the carb mounted relatively low, to fit under T-bird hoods. High-riser's had a straighter shot from the carbs into the chamber due to the raised carb pads on the intake...they were much higher than a low-riser's.

Medium risers were just that. They mounted the carb somewhere between the extremes of the high riser and low riser intakes. They also reconfigured the runner shape. A low-riser's intake port in the head is actually taller than a medium-riser's port.

The only way to answer your question definitely is to lay a straightedge along the carb pad, and measure. Or rely on your builder. Just make sure your builder knows specifically the application the motor is going to be installed. I would think Keith Craft might have a few measurements available to him as well as a little experience as to what will or won't work/fit.