Scored Main Cap Bearing - Ouch

Ive always sent the shortblock out, and here again my problem but I created it, but As long as you guys are around to help I'm not afraid to tackle the rebuild. Less than 500 miles on this mtr. I did see some wear lines on the cylinders from underneath, probably the trash that came off the bearings. Ok so let me ask this, bear with me. In my shop I have the original shortblock mtr (not really but was put in the car in 1975 spun a rod in original mtr). It has TRW forged piston and some rod oiling mods, flash removed from valley etc. This mtr in the car now has KB hyper piston. So if I wanted to take the semi original mtr and build a stroker should I do a 416 or 372. I had a 372 in my Valiant that made 550/500 roller cam mtr and that car would rev so fast with the 4:30 gears you better be on your game. I shifted it a 7K and it is still running today after 14 years. Sold it to a friend in NY. I loved the way it ran, but a slower rev mtr with more cubes and torque might make more sense for a 4 speed car. The Valiant was automatic. Cost is a big factor as I and my wife are retired and live off SS, but I think I could do it. The other restriction is the X heads that only flow max 260 at 525 lift. Dont know if they would support 416ci. What do you all think? The Valiant had a Mopar Perfromance 3.58 cast crank and they are about $425. Need rods and pistons also. Go Scat or what?