Can you post the #'s? i have a set of Brodix 10's also with #'s on them, i called Brodix to see what they meant. My are marked RP's FP's, SP's they mean raised intake ports, filed pushrod holes, and spead port exhaust., Mine are fully ported but i don't know by who, but they flow 314 CFM at .600 lift, with 2.150 int valves.
Is this the ph# you have, the site listed below it is a profile of the business. Don't know if he's still in business or not though.
Name: Chapman Racing Heads Inc
Phone: (801) 292-3909
Fax: (801) 292-3701
Address: 2261 South 1560 West
Woods Cross, UT 84087
http://www.manta.com/c/mm2mt6s/chapman-racing-heads
Zip.