I believe Reg ran the stock intercooler in the One Lap of America (placed fourth). His car had a single and I believe made in the low 600 rwhp range. I think you will be giving up some horsepower with the stock intercooler, but I would rather give up some horsepower and not overheat the engine. When I go single, I will probably run a T66 and I plan on using the stock intercooler or running two stock intercoolers.
Later, Steve
Later, Steve