Just my opinion, but if you're starting from scratch on a full stroker build, it seems silly to start with a 383 block to pinch on a few pennies.
I've heard that same comment from others. Currently looking for a 400 block.
I am a great fan of the low deck 383/400 Block based Strokers..... I've been building them since the mid 80's
that said,
the only caution I have for anyone considering them(383/400 Blocks) in a mufflered street Car Stroker application ?
and,
given the lack nowadays of Machine Shops
with a BB Mopar Torque Plate ?
which can make fitting the very short 1.32" CD 2618 alloy Pistons difficult.... and typically resulting in audible/noisey "Piston Slap" present in the Engine once completed.
Hence is a guy is only looking at 500-600HP/Ft/Lbs Torque in mufflered street cars..... which ALL Blocks are satisfactory for carrying......IMO, advantage goes to the RB Blocks with the longer/
quieter running 440 Pistons based on higher CD's.