Yeah I'm comfortable running it too now that I've found a sweet spot where it looks like it will fit. The margin for error is kind of small though since a few degrees each way and it runs out of clearance in a hurry. One nice thing about the belt drive is that it only takes me a few seconds to adjust the centerline and then I can double check the clearances. Doing it with a chain can take a bunch of time.

Any thoughts on the Crower 300R cam? I bet it will make some torque, just not sure it will hold on long enough to make much power in the 505. It is probably too aggressive to be a street cam although Crower doesn't really recommend super stiff springs for it. 261/263 at 050 and 460 lobe lift. The 105 LCA seems a little odd also. I called and asked them if it would work with 1.70 rocker arms and they said it would be fine up to 7000 rpm. Guy I talked to said it is a really old cam design that seems to work great. I bought it 20 years ago at a swap meet but never ran it.