olds 307 and 403

My 350 is right around 9 to 1 compression, 64cc heads, .028" head gaskets and a stock 76 bottom end. Measured #6 heads, 62-64cc with 2.05" intake and 1.56" exhaust valves with the bowls opened with a cutter. They also have better springs and positive seals. I got a custom 214/214 .472/.472 on a 110 lsa from Mark. The cam was degreed and was nearly bang on. I used a Performer with a 1" open spacer, I opened the spacer more the better match the Qjet. The Qjet is custom tuned and I can adjust the part throttle mixture in 5 minutes. I also used a dual snorkel set up feeding air from the front fenders. I used 1 5/8" Sanderson shorty headers and 2.5" dual exhaust with a compact X pipe and Areochamber mufflers. I never made it to the track, my daughter the day before ran my 2004R low on oil. I am wondering how much of a gain the RPM intake would be on my combo? I had bothe sitting on the shelf. Just curious, what maybe 275 to 300 HP and 350 TQ? I will be running the stock TH350 and 2.78 gears for now, just upping the shift points. Anyone test the stock converter flash point?