Yeah this is very good stuff!

I didnt know that the FWD Caddies were delayed until '85, and that the 4.1 was never meant to go into the RWD ones! Awesome!

It seems more logical after you learn this stuff, basically they HAD to put the 4.1 into the RWD Caddies, and it wasnt intended to go in there.
gdwriter, the 4.9 does still have iron heads.