mike85z28

Can anyone tell me what mods have to happen to make a 350 a 355? Is it just boring .030??? And if you have a 355 how hard is it to make it into a 383 stroker?? Also I'm having issues on what cam to use for the 355 or 383. I really dont understand all the different sizes lifts and all that other stuff involved in selecting a cam. Thanks!!

Z28SORR

Yes, it's just a 350 that's been bored. A 383 requires both over boring and stroking. i.e. you need to buy a new crank, rods?, and pistons. Lots of people make kits.

mike85z28

For the 383, what do I bore it, .030 or can it be .040? I seen in Summit that they make a stroker kit, its about $1100. Does that seem like a good price?

rskrause

30 over leaves room for another 10 to be taken out later if needed.

Good price? Depends what's in the kit. You sound new at this so a word of advice - budget about 2X the price for the basic parts. "Little" stuff adds up quickly. Also, it is often best to have the machine shop order the parts. About 1/2 the time when the customer orders the parts something is wrong and this requires time/money to fix.

The best bang for buck is to re-use your stock crank and rods if they are in good shape - go 30 over on the new pistons to make a 355 and put the money you save on the bottom end into the top and valvetrain, which is where the power is.

Rich

mike85z28

Yea I'm kinda new to this. In your opinion, would you go with the 355 or a 327? I have both. Its going in an 85 Z28. The 327 is bored .030 and pretty much the rest is stock, I think. It may have a bigger cam than stock. And the 355 is just a plain 355. Thanks.

rskrause

355, bigger is clearly better all else being equal.

Rich

mike85z28

Thanks!!