Zen,
I made ALOT of cardboard templates before finally cutting the aluminum. I made the mounts to the engine block first (L angle aluminum brackets) and then layed the cardboard ... if it didn't fit right, I just cut a small section out and then taped in a new section. When I went to cut the aluminum, the template looked like a jigsaw puzzle
I'm working on a datalogger now ... 4 T/C's for each sparkplug hole, 1 T/C for EGT, 1 thermister for ambient temps, a hall sensor to attach to one rear axle for speed measurement, and an induction sensor attached to #1 sparkplug wire to measure rpms .. all based on a Motorola HC11 microcontroller. This should be a cool little project .. hope to get it done in time for the track ! .. a topic for another thread though
Sandeep