08 silverado z28

I been wanting to start a new project and while looking for donor blocks I've been finding a lot of 5.3 blocks for very reasonable prices. 4.8 is the same block and I see those a lot too. My question is if there were stroker cranks available. Overall what is the most displacement I could get from that block

slowride

iTrader: (3)

Can go with a 5.7 all bore for cheap with the stock crank or a stroker 4", etc. 5.3 iron and aluminum will bore out to 5.7.

racer7088

We do iron block 4.8/5.3 383s all the time. They work great. Block is bored to 5.7 bore size and then 4.000 crank.

08 silverado z28

U would have to bore It out like over .100 will that block take that?

racer7088

Yes, I guess GM originally was going to have an iron 5.7 as well since these are VERY thick. Most we have done are turbo or blower deals and they seem to run better and make more power than the aluminum 347s so they must be plenty strong I would say. I wouldn't go larger than that though.

08 silverado z28

So again that have a 3.9 bore from a 3.799 that's a good bit. So that's all I need for a 383 cubic inch? 3.9 bore and 4 stroke

racer7088

Yes that is it.

08 silverado z28

That's awesome guys. Thanks for the info

racer7088

Silverado there's a block like that we have right now already totally machined if you want to see it ever here in Houston.

08 silverado z28

Thanks I appreciate that. But I'm taking my 4.8 out for a 408 so I have that block laying around and was wondering What I could do with it. Ill keep your place in mind though thanks