Which stall for this combo.....

I'm gonna be way more conservative here...

Your compression looks spot on, you live in the UK so hot temps are rare. A 4" arm will eat duration with that [email protected] cam. Should act more like a 232 in a 360. As long as your pump petrol is good and you can run some aggressive initial timing, i don't think anything higher then a high 3k flash converter is needed.