IH 400 series in a 7030 Allis

Have a 600 cu in IH 400 engine, how difficult would it to be transplant that motor into a 7030 20 speed power director tractor? Wanting to use for mph and open stock classes.

I have billet rods, pistons, new sleeves, cam and 12000.00 worth of parts in my 600. Still needs pump and charger. Dry head 330 cfm. Have owned 7030 and 7050 in the past. like the style. Had hoped to use the Detroit block, but have been informed that internally the motor and head mounts are substantially different, and my kit will not work in a Series 40 block. Additionally, was hoping to utilize the ih rotary pump, as models are now available with 600 plus cc's per 1000 strokes. The ih pump was the factory pump on last run 7080s, and the N6 combine, per my research. Replacing the power director with a steel flywheel and multiple disc clutch removes the high side gears in the 7030, but the remaining gears would offer multiple gears within 8mph to 16mph at rated rpm, more at 3000, for mile per hour classes. I bud of mine has 7 D-21s, a WD  45 with a 430 Lincoln engine, and a dozen other various creations, besides a prostock and superfarm D21. His prostock has a 6 inch billet head he made with a hand grinder---don't know if he'd agree with my actions, but he has played outside the AC box a number of times. ALL OPINIONS, COMMENTS WELCOME.

Gross, call it Bastard Allis.