Tom:
What A/R turbine housing did you end up going with? I got my eye on a 60/69 turbo on eBay. Do I need to go bigger on the turbine end? I was going to get a 3.0L Marine electronic distributor base and put in the 4.3L guts to run the timing. Same size and proportions as our 6. I think the MegaSquirt will interface.(?)