Building a new 505 With Callies / Mopar Performance Block
The past few years, I've taken a liking to Manton! They were cheaper than my local Trend and QUICKER. I'd go right to one of their cheaper non-tapered 7/16". They use a longer end at the lifter to help for any clearance issues negating the need for a taper. I always have used a offset lifter seat on the intakes, that little bit really straightens the trajectory for my liking. Even with a centered lifter I'd bet any clearance needed would be minimal.