The 350 has the same bore (4.00" standard) but a longer stroke (3.48" vs. 3.25") than the 327. I like the quick revving and responsiveness of the 327. Better stock rod/stroke ratio for all around use (Bill "Grumpy" Jenkins and I think so :). My engine has the iron block, iron heads, an aluminum water pump (6 lb. savings). I have an Aluminum dual plane high rise manifold (~15lb. savings) and Hooker block hugger headers (how much?). I will use a gear reduction starter (9 lb. savings). I saved a little weight with the headers, intake, and water pump, maybe 40 lbs. When the car is sorted out, and I find the bucks, I'll start hunting for Aluminum heads - which will shave another 40lbs. So now you are down to the 500 lb. range for the complete engine (assuming a complete iron small block V8 weighs 575 lbs.)