The 1936 Olds Six rods are the ones to use for stroking a Ford 226 according to an article in Hot Rod Magazine, February, 1951 on page 26. Same info in Trend book #106, Hot Rod your car, on page 121. The original Ford crankpins are 2.234" and are ground down offset out to 2.00" increasing the stroke .225 " to 4.625" which increases the cubic inches to 237 with a stock bore and to 257" with a bore of 3 7/16 inches. Tthese sources mention only G engines and not the later H or M versions with a higher deck height, longer rods and larger crank pins for the stroker treatment. Other sources show the 1937 Olds crankpins having a 2.125 crankpin diameter, both 6 and 8, so the 1936 rods or maybe earlier are the ones. Still, maybe it could be worked out for the H or M with the piston pin holes relocated as the rod journal widths are the same. Is there any reason you are using the G engine instead of the H or M? Or are you?