Actually a 68 Valiant. That was the first engine. Closed chambered 516 heads hyd Comp cam .525 lift RPM manifold. Ran low 12s in street trim. Changed to RPM heads, 590 mech cam and Proparts headers. Went low 11s in street trim (complete exhaust and interior)
187 or 699 pans will work. I have a baffle template for these pans if anyone needs it. Print it to fit an 8.5"x11" sheet of paper, then glue it to the sheet metal and trim.
You may have the mounts turned 90 degrees or even 180.That will bring the motor forward about 2 inches. Made that mistake myself. Also did it come with the shim pack? I used the shims to level it once it was in. Do you have a picture of the drivers side?
Here are some flow numbers for BB Chrysler heads. Early heads pre 66 are not even listed except for Max Wedge heads. Numbers speak for themselves. Stan Weiss' - Cylinder Head Flow Data at 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software
I usually put a thin slit in the bottom, which causes the diameter to squeeze a little smaller. Then tap it in with an open end and a hammer. I do use sealant on the end.
You can put the column in first, just trim the outer sleeve back. Install the manifolds and it will drop right in. An access hole for #6 plug will help. Take a look!
Technology ruined golf! 400 yard drives and every hole is driver wedge. They need to limit golf ball distance or club size. Watch the old golf films between Palmer, Nicklaus, Miller and Player. Try hitting a 1 iron into a green!