So I can get a deal on a bare zz383 block and was told it has the 4.00" bore and 3.80" stroke. My question is can I go with a 3.75" stroke crank and 5.7/6.0 rods? Also im sure If I bore it .030 over that shouldn't be a problem i assume.

I've been looking at the stroker kits on ebay and everywhere else and they are 3.75" cranks and didn't know if I would be running into a problem since the zz383 blocks came with a 3.8" crank. Please any help will be greatly appreciated. Thanks guys!!

 

Are you going to be assembling all of these components (cam, pistons, con rods, crank, etc., etc., etc.) yourself or are you going to pay somebody to do it?

Before you think you can do this for less than what the factory is selling those short blocks for, you'd better check on the cost of assembly.

 

I will buy the parts and have a machine shop put them in. I'm just saying cause I can get the bare zz383 block for $200 and wanted to know if a regular 383 kit with the 3.75" stroke will work

 

You should not have a problem because the block has been worked for a 3.80 and you are going a hair smaller with a 3.75 I dont see any problems at all. But to be sure ask the machine shop because the balance could be different

 

So if the block is worked for the 3.8" crank, then does that mean the 3.75" will not sit flush with the deck of the block?

 

The block has not been " worked".
It is the same # 10105123 block casting as used in the ZZ4 350 /Fastburn 385 / Ram Jet 350 / and other HD engines which is factory clearanced for a 3.800 crank so you don't have to do any grinding yourself
http://www.sallee-chevrolet.com/Chev.../10105123.html

It is just a HD 1 pce crank SBC block that GM decided to put a 3.80" crank in with a stock 4.00" bore to get 383 instead of a 3.75" crank and 4.030" pistons the aftermarket uses to get same size

Bare block has nothing to do with balance; that will be dependent on what parts he puts in it

 

Where the pistons sit is determined by your piston / rod combo and how much you deck the block

 

I was thinking by your regular stroker kits that you get everywhere. Lets say either 5.7/6.0 rods with .030 over pistons. Of course with the 3.75" crank

 

Final compression desired will determine your piston choice along with the size head you have.Should pick your head before deciding on pistons ; flat top or recessed
Nothing worse than building new short block only to find CR is not what you wanted with the heads you have and you have to buy new ones

 

I was thinking of the edelbrock victor jr. heads which are 67cc I believe and with some flat tops they yield around 11.1 cr.

But I might just have to contact a machine shop and see what they say.

 

That is what I ment. While the block was cast as that, I was thinking non aftermarket block, my fault there. I know a bare block has nothing to do with balance, only the crank does as well as balancer and flex plate/flywheel. And pistons and rods if he spends the money. I was thinking about a different setup.

 

Yeah I'll make sure everything is balanced, my main concern was since the zz383 came with a 3.8" crank, if a 3.75" could be used and if there will be any problems? Of course I will be getting all new rods/pistons/etc...

 

No problems everything will fit. Good luck with it, and post some dyno numbers when you can.

 

Sweet good to know. I'll post up results whenever it's done