68 Cuda 383 vs a 360

Hold up, last I knew 426 was the max you could go with a 383? (which brought much more appeal, for me, to the effectively small block 383) Who has a kit for this? Or is it a piecemeal operation?
Type into the search bar; 440source.com.
Scroll down to check out there stroker kits.
Ma MoPar has had the parts to stroke the low deck with a 4.15 crank for decades. There best head was the Stage VI.