Yeah, Riva and Protec cost more money...
ADA Complete: $345
Protec:
C2 head shell - 701/760 $390
C2 Full girdle update kit - 701/760* $240
Riva:
Head Cap, Non-Girdled, 2cyl, 3 Exhaust Mounts $130
Girdled Head Body Kit, 2 Cyl. (81-85.5MM Bore) $240
Domes $39.95 ea
TOTAL: $370 + $80.00 domes...