70" 340 vs 72" 340 specs please

hi, I looked at national records for 340 cars. E/SA record, 10.58 @ 123.76 mph, 1973 duster with low comp 340, F/SA, 10.73 , 1969 340 b 'cuda, with high comp 340. just food for thought. the 72 -73 340's can run fast.