O'2s sensors
 

I was wondering were i could find a set of O'2s that are specificly for racing fuel such as 112 or 114 leaded gas. I would like to have a set for my 396 its gonna be 12.1 compression but the guy(Loyd Elliott) thats doing the heads a cam is gonna bleed the cam out were i can run either gas. Just wondering were i could find a set of O's like that and how much would they cost?