Same stroke (3.48), different bore. 305 has 3.737 bore and 350 has 4.000 bore if memory serves me correctly. 737 is easy to remember cause a buddy of mine flies one. I put some World Products heads (1.94 x 1.50) on my 305 and a .500 lift roller cam (Comp) with a little more duration and roller rockers, an Air Gap intake and a new Holley Avenger 570. Oh yeah, 700R4. Yee Haw
