1 - Late model coolant system conversion - moves the expansion tank to the left side, swaps the inlet/outlet sides of the rad so you can use E36 or Z3M radiators (and as far as I know these are easier to source). Downside is that you need to buy hoses, radiator, expansion tank, water pump (or blockoff the extra port on the early WP), crossover pipe (which is hard to source, and you need to find a way to mount it since the early timing belt cover doesn't have the mounting provisions), and move various electrical for coolant level sensor (and I think fan switch on the rad?) If you can find someone parting out a late car and rip everything off it, that would be the easiest way.
2 - No real opinion here. I had a 4-gauge pod in the center vent, but the Oil pressure and oil temp never worked. I eventually relocated AFR into the instrument cluster where the Check light used to be, and I just use my GFB boost controller as my boost gauge.
3 - I'd send it with the cheap BOV until you have a problem.
4 - No real opinion, in Canada and with AC deleted, I have been fine with a slim SPAL 16" pusher fan (I can't find the model number, I thought it was something like 1.85in thick so I assume the CFM are low) between FMIC and rad and the 88deg Mercedes fan switch.
2 - No real opinion here. I had a 4-gauge pod in the center vent, but the Oil pressure and oil temp never worked. I eventually relocated AFR into the instrument cluster where the Check light used to be, and I just use my GFB boost controller as my boost gauge.
3 - I'd send it with the cheap BOV until you have a problem.
4 - No real opinion, in Canada and with AC deleted, I have been fine with a slim SPAL 16" pusher fan (I can't find the model number, I thought it was something like 1.85in thick so I assume the CFM are low) between FMIC and rad and the 88deg Mercedes fan switch.
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