You might not want to hear this, but...
For what you are saying you want for this engine and the cam you want to use, your compression is probably too high unless you are OK with running only premium fuel.
I'm on my second 360 build with an Engle k52/k54 (5052/5054) grind with a 112*lsa, no advance on the intake, and 8.5:1 compression. Ive recommended it to several others including one 401 build that was at 8.75:1 compression. The 401 owner later went to the k54@110* and wished he stayed with the 52/54.
Both the k52 and k54 grinds are short duration/low compression grinds. They are best under 9:1 compression. I did a compression test a few months ago and was in the 140-145 psi range. I havnt dyno'd mine, but Ive had two different people "desktop" it and both came in around 350lb/ft under 3500rpm.
Heres the card from my latest grind...
As of last year, Engle is no longer in Santa Monica or owned by the Engle family. They sold to "SoCal Imports" who specializes in VW's. Ive run a bunch of Engle cams over the last 25 years and mostly in VW's. Growing up in Santa Monica I always enjoyed stopping by their shop, but I dont know if this new company is grinding in-house. I would have a talk with them before ordering and make sure that they are at least being done in a reputable shop locally rather than out of state, or country.
Also, the new catalog is wrong in the CR recommendations, they have 9:1 listed for all the cams up to 298* duration. The old "Engle" catalog had the the k52 and k54 listed as under 9:1 compression, and the longer cams listed from 9.5 on up to about 11:1 for the longest durations.
Oh, mine idles fine. I have about 17in/hg at 700-750 rpm.
k.