I have a Pro-M 80 MM maf calibrated for 30 lb injectors. this is the shorty style for a non ODBII, you will see in pics below.
it comes with the filter as well. this supposedly out flow the 90 lighting maf.

Model# 80R
serial# 64B592 or 04B592 they were etched in by hand and i cant be sure
calib# 30C

I Paid 160 for it, so that is what i would like. i only used it a short time.
I originally bought this to use with my PMS, the PMS is gone so i dont need this any more.