400 budget compression HELP +++++

I don't know anything about bigblocks.
But I can do a litle math
It seems to me,the 400 makes a real nice stroker pkg, and if stroker is in the future, Why not bring the future into today. And then bolt on the top end you already have. It seems to me, that would cover all the bases regarding compression and budget.
The cost of the crank would be offset by some/most of the machining costs.

If your current pistons really are down .125, then a 3.75 crank will raise them up by 1/2 the stroke difference or (3.75 - 3.375) x 1/2 = .193. So now the pistons would be up at (.125 - .193 =) .068 above the deck. subtracting .040 for the gasket, that puts them into the head at (.068 less .040 =) .028. Adding .035say for squish,means the open-chambers need to be (.028 + .035 =) .063 deep. Is that not pretty close? If it is, then your costs are just the crank,making it fit, and a re-balance.How much could that cost;versus some of the other solutions posted here? I guess compression would swing the other way now, and we'll get a new thread "help me reduce the compression of my 450". To answer that, I guess if you cannot machine an appropriately sized dish into your current pistons, then KB(at least) makes pistons for this application.But I get about 10.2Scr with a 90cc head, and those flat-tops.If that math is right, then it wouldn't take much of a cam to drop the Dcr down into street-friendly territory.I worked it out with a 66*ICA to 8.0Dcr/160psi. This puts you into a very mild cam; I'm going to guess something like 276/286/112, in at 108.
Oh and the math comes to 4.372bore x 3.75 = 450.3731 cubes! That is plus 12.5%
Or am I out to lunch?