Freedo,
There are some models rated at 210cfm, don't have the part number, but worked with then a lot, good driveability, good mileage. They were used on Phord trucks. The 350 cfm(7448) can almost be considered a li'l bigger than desired, but some fine tune will make them good. There are models with 2 stages likages, You can search and You'll find it, also don't have the P/N here now. Stay away from the 4412 - 500cfm and the extra rare 6245, 600 cfm. They will be a lot more than desired even for a bigger and hotter engine.
