How Would You Build This Stroker?

Having built a few of these, I would tend to go for the longer stroke, not necessarily a 4.25( that really depends on whether highest average torque is your priority over peak HP) but something over 4". The reason being you have that tall 9.58" deck height that ( to me ) you might as well try to fill since a tall Compression height piston just adds weight.

When I rebuild my 414 someday I'll probably look at doing an offset ground 2" rod journal and add some stroke to maybe 4.1". Why not? It's an extra 11 cubes and a lighter bobweight. I'd use at least a 6.125 or maybe even a 6.25 Rod. 11 cubes is not much but that's another 6-8 degrees of intake duration I can run with no downside as well so at 1.35 ish lb/ft and 1.3 hp per cube it's close to another ~20 to the good