gas has a higer octane that petrol which will allow you to run more boost.
it is extremly easy to run GRA carby blow thru, which is your best option.
If i were u, go the stock turbo's or single turbo, thru a cooler, then up to the
GRA throttle body. Just like ur replacing the old EFI Tb with the gas carby.
Then get it dyno'd and your setAll that is needed is a balance line from
the turbo outlet to the convertor top cover.
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