reboring my 305 V-8 engine

Hey I want to rebore my cylinders in my V-8 305 engine to a 350 but the thing I want to know is if i do that, would there be a diffrence between that and a manufactured made 350 engine. I don't even know if this is worth it but I am just brainstorming some ideas. Does anybody know?

305 = 3.740" x 3.48"
350 = 4.000" x 3.48"

I don't think that is possible. Engines that are bored on the extreme side tend to overheat easily. I wanna say that the most you can bore a cylinder is about 0.080" I would just buy a 350.

305 = 3.740" x 3.48"
350 = 4.000" x 3.48"

I don't think that is possible. Engines that are bored on the extreme side tend to overheat easily. I wanna say that the most you can bore a cylinder is about 0.080" I would just buy a 350.
This is absolutely correct.
GM used smaller cylinder cores when casting a 305 (as compared to a 350 casting)
They did not use 1/4 inches of extra cast iron in the cylinder walls, so there is no extra iron to remove.

Correct. The thickness of the cylinder walls is about the same on both blocks; about 5/16". So, if you tried boring a 305 by .265", you'd have surpassed the safe 1/4" required for rigidity, combustion pressure, and block rigidity. Even if there were enough meat, it would cost more to bore it out than to buy a brand new 350 block. They're available for $200 these days.

The most you can safely bore the 305 block is .060" over. Its possible to do more if you sonic-check the bores for core shift, but usually no more than .060".