My new 340 at the track

ya it might be. i'll never know. i know of a few strokers (408-418) at my track that weigh the same as me. they are not faster then my car. they have Eddie TA heads with 600 lift cams (same as cam). i shift at 6800 so the rpm is the same as a stroker

Stroker will definately be faster, all other things the same.
Look at NHRA pro stock and mountain motor pro stock. Only thing different is the cubes. Significant difference in the time slips.
You car would run 9.30’s-40’s with a 4 inch crank.