Old Pro-Jection 4D...Uh, never mind. Although they actually worked without a laptop, an NOS carb would cost the same and work as well. I was blown away when I actually installed a brand new NOS carb (Not rebuilt) on a motor. That thing started right up cold with one pump, rock solid fast idle, came off the fast idle as designed and idled butter smooth at 600 RPM. Carbs wear out even though they have few moving parts. EFI is awesome when its set up correctly on an adapted motor (440) but there is a learning curve. Some of the newer TBI styles will tune themselves. Good luck, weight the costs against a NEW carb.
