I had my TTI's before installing engine, and hung them in rough position before putting in engine. I have done some engine work and headers won't come out past engine either way.
I have a 7 blade HD fan on a Murray 2947 thermo-clutch. That is the extra short model. I use the Champion CC374B aluminum 26" radiator. I had originally had flex fan on but found little crack, so replaced w chrysler repro.