IROC-Turbo

Newb at carbed cars boosted here.My problem is im running 2 bars rich cruising,but under boost it doesnt even register.At idle it dont register either.The carb is the factory turbo quad for the 301(800cfm-if i remem right).Not sure of the jet and rod sizes in the carb though--cant seem to find that info.Fuel pump is new but its just a stock replacement return line pump.I put the O2 senser in the down pipe--should i have put it elsewhere??Thanks

Rick King

i wouid try the o2 sensor up line from there then get back to me--put it before the waste gate

later and gb

rk