I got mine +.200 from ARC. It’s not a bad build, just make sure to use a welded billet cam, not tool steel, as you will need to clearance the rod to the cam.
How about that motor I have pictured? .150 stroke Lunati crank. 1 inch pin. Bored .140 . Wiesco piston. 4.375 Horstman H beam rod with about 20 hours of die grinder by hand labor for clearance. 126 Dyno cam. 1.125 and 1.250 stainless valves. Blue Jr. Race Billet sidecover. Clements steel billet 3 hp wheel. EC stage 1 HL380 all ready to go.