Here is a finnish link with some good "in the build" photos.
http://www.hut.fi/~mkolari/orangetoy/
I have owned 4 of these, currently build one up for race use with a 3T-GTEU/W55 and IRS from a TA63 Toyota Carina and the firewall recessed 4 inches. The Club K link Bill posted below is a good place to start, there are members with 4AGE's, 20 valves, supercharged 5k's and even a 2l Cortina motor in a rally starlet.