Hi Diesel Paul,
I'm one of the Turbo 240D guys. I've posted some stuff on pump mods and pics of my setup, so if you search for my posts there is quite a bit of info there. I'm currently running a turned up N/A pump, but its not at crazy levels by any means. I have never put in an intercooler, nor a egt gauge, nor piston squirters. I am running a larger oil cooler from a 300 though. I figure the compression heating of the air going to 9 PSI of boost is really not high enough to justify the insanity of trying to cram an intercooler into one of these cars. I did look at what it would take to do it, but it would require moving the radiator back, probably going to electric fans, or cutting a hole through the hood with a scoop Subaru WRX style. If I was going for insane fuel and boost for a race car, sure I would do it, but not for a pretty mild daily driver!
Cheers,
Chris

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1983 Turbocharged 240D
1982 Mazda RX-7
1974 Mazda Rotary Pickup Converted to an EV