Nice build so far along with some interesting ideas I hadnt thought about.
I didnt cut my tub with this radiator setup:
forums.pelicanparts.com/porsche-911-technical-forum/488187-help-me-style-beat-up-old-912-a-18.html
I took idea from PVX who had done the job very nicely. Take a look at his build page - search PVX, cant miss it.
Keep up the build, should be fun once complete!!