318 with 360 heads milling : small valves

2 things:

1. If you cut the 360 heads about .040, you'll still be lucky to maintain the factory 318 compression. However, I have used cut 360 heads on 318's and always had a good response, but mainly as the RPM's build. My question is why not the whole 360 in the fury?
2. You can put a 340/360 intake on a 318 and forget the port size difference. Done that more times than I care to remember and always have had a great results.