rumors?

[82 EL CO]

ive been told that you can take a 305 and have it bored out to a 327 or a 350. is that true ans if it is how reliable and strong is it and how much would it cost? and would the stock inside take a crank,cam,rods,pistons, and etc from a 327 or 350 any help would be great thanks.

 

[Jim Rockford]

well you heard wrong ,you cannot bore a 305 block to 4.000 inches.

 

[montecarlo78]

There is no way to bore a 305 out to a 350. 350s and 305s share a common stroke of 3.48 inches. 327s use a shorter 3.25 inch stroke and the 350 bore. All of the parts except the pistons can be interchanged if you want to. There probably isnt any reason to de-stroke a 305 though. A 383 crank can be used to make a 334 stroker.

If you are serious about a performance upgrade look into a ZZ3

 

[pose_442]

For the money, I would think going with a good streetable 350 would be the best bang for the buck. Easy swap, accessories should transfer over, and paint it the same color as the 305. Fun sleeper.

 

[85 Cutlass Brougham]

Well, although the 305 and 350 share a common stroke and crank casting, it is not a good idea to interchange them. The reason is they are both balanced for the significantly different weight of their pistons. You would need to add or subtract a lot of weight from the crank's bob weights to balance one crank in the other engine. Considering that a 305 has a cast crank, there is no reason to swap it into a 350. Putting a forged 350 crank into a 305 ( not all are forged) would also be pointless as the extra money for the labor to rebalance it would be enough to just use a 350 to start with.

Also, most SBC's take a maximum of a .060 overbore and a 305's bore is smaller than a 350's by more than .060.