This would create seriously low compression. If the deck height is machined down, it would cause fit-up problems for the intake manifold on a V8 engine unless it is altered too. When you DE-stroke an engine I was wondering if you had to do anything to the block like boring it. I'm not sure about de-stroking When destroking and engine you don't have to bore it over. You do want to check the main journals.
Some cranks have smaller journals depending on a number of things.
For example if you are stroking out a 350 to a 383 you would use a 400 crank shaft and 400 rods, but the cranks mains will have to be turned. You could also use special pistons with the pin deck raised and use longer rods and decrease the rod angle ratio. To destroke a 400 you could use a 350 crank and 350 rods, but will have to use special bearing to compensate for smaller journals and you'll end up with a 377 yuck. In all cases, the piston dwell time at TDC will be substantially longer therby putting a piston in the way of the valves unless some work is done in the area of valve clearance. Do not assume that by de-stroking and correcting the deck ht.