Advice on my "stock" 340 build

All my 68 4spd Darts had 391's with 14 inch bias tires. usually up graded to G60 rubber That is when the experience was a hand full of fun. Low gears, little tires . The 440's 4spds with 410's and G78's many of them never made it past the test drives. The first thing you did with those was Slicks. But don't drive them in the rain no matter how much weight was in the car.