Who is running a Quikfuel 450 on their Slant

I will give that a try when I get the secondaries adjusted, right now they are opening too early and bogging when I floor it, so yesterday I turned it back to the position it was in from the factory. I turned the secondary screw one turn out before paying attention to the floats. Right now, if I do not kick in the secondaries I do not get any hesitation, but when I kick them in I get a bogging sound. I will test it out this morning and may need to adjust it more.

It will probably need tighter than the factory setting. I would "just guess" those carburetors, like all four barrels, come set up for a small V8. When a vacuum secondary carburetor is set correctly, you should not be able to detect the secondary opening at all, but rather just feel brisk acceleration. A bogging sound and feeling normally indicates they are opening too soon.