400/426 Stroker. Ever heard of one?

Just to make sure I'm reading this correctly you used a 383 block @ 4.375 in bore ? Did you sleeve it ? Or is it a 400 block?
Reason I'm asking is because that's a .125 overbore and if you got that bore from a 383 I can see a resurgence in 383 popularity.
Also if you did sleeve a 383 could you pm me the sleeve p/n you used.
Be much appreciated!!!
Thanks
400 block and turned 383 crank