1971 340's True HP?

My understanding is NHRA immediately refactored the '68 to '70 340 to 310 HP when it came out in 68 and the '70 six pac to 325 and the '71 340 to 330 . The '71 was the hottest of the factory 340's with it's Thermo Quad ( listed as 800 but actually 737 cfm) and wonderfully designed TQ manifold. The '72 was pretty much the same engine except for the 360 intake valve 1.880 and about 1.5 points lower in CR. Those '72's were good performers also with actual HP numbers around 290 . The big valves worth about 20 HP. The '72's were about equal to the '68-'70 AFB 340's . JMHO.

Terry