umm...im not sure but ive heard of kits for the 305's to stoke them to 326's....maybe im wrong...i dont know how much is different from a 350 on a 305...see my buddy would convert his to a 350 if there was a way to keep it smogged and everything....if he cant then he wants to explore the "326(???)" idea...n e info is great...thanx

 

The 305 is based off of a 3.735" bore whereas the 350 platform is a 4.000" bore. The stroke is the same (3.48"). It really isn't possible (well it is, but not exactly the brightest thing to do) to take a 305 over to a 350 as far as the bore is concerned.

In order to achieve a 327 from a 305, you would have to remove the block from the car, take it to the shop, have them clearance it for a 3.75" stroke crank, and then completely re-assemble it. If it is coming out, just get a 350. For the price of machining and whatnot to get a 327, you could have a 350.

Either way, the engine will have to come out. So just do the most logical thing and get a 350.

 

Typically, the pistons (and they are different) that come in such a stroker kit, will be 3.766" - .030"-over - so you end up with 334 CID.

However, as Stekman points out, it requires machine work. Plus, a kit to stroke a 305 costs more than a similar kit to stroke a 350. The economics of volume, you know. In the end, you'll spend as much to create a 334 stroker using your current engine, as you would to go buy a 350 core and stroke it to 383. Just doesn't make sense. You'd be better off rebuilding the 350 core than you would stroking the 305.

Resist the urge. It ain't worth it.