IMO, converter is fine.

I run 15 PSI in my street radials. IMO, ETs are pretty touchy to air pressure. 7 year old tires are your biggest problem.....

Your MPH shows bottom 11s when hooked....


72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.