An intercooler is NOT going to help with coolant system overheating or temperature regulation.
An intercooler (air:air or air:water) is used to cool the INTAKE air charge before it enters the plenum after passing through the turbo. Compressed air, from a turbo, gains heat when it goes through the turbo. A cooler air charge results in more power. You can turbo charge anything without using one, but will get better/more power with one. That said, ensuring the right spark advance and fuel mixture is critical or else you'll blow giant holes in your pistons and heads from detonation. Turbo'ing a Rover V8 would likely require some sort of aftermarket engine control system and an upgrading fuel system for sure.
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'95 RRC LWB, '05 Suburban Z71 (not stock), '94 F350 (only the cab shell & rear bumper is original), '62 International 404 tractor (red & white) & many other project cars in the past!
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