My Z28 is an 83 but my carb accroding to the casting number is from a 87. Any differences i should be aware of?

 

Nope. Assuming both are cc-qjets there shouldn't be any difference.

 

there are differences but none to worry you,

jetting, is one difference,

some CCC q jets had an extra electric internal control device inside them, depending on the application, was an extra one wire device in them, one example was on the 86 c-10 305 pickups

good luck

 

well only connectors on it are for the tps,mc solenoid and choke. If the jetting is different what should i jet and rod it to currently have an lg4 but would like to re-use the setup for a 350 in the future.thanks

 

The primaries should be fine on a 350. You'll want to change your secondary rods/hangers if you've got the stock LG4 ones on there. There were some vaccuum port differences for later q-jets, but no show stoppers.

What secondary rods/hangers are in it now?

 

I believe they are CK rods

 

or maybe ch cant really read it clearly

 

Looks like standard lg4 rods. You'll want to upgrade your secondary rods/hangers. There's a tech article on this site that includes a recommendation. I can't remember which ones I put on my camaro, but I'll check tonight.

 

yeah i"ve seen the article i think it mentions cc rods sound ok for my 305 then should i change again for a 350

 

Yea CH rods are basic LG4 rods.
Try to find some DR rods, or DA rods. DR's came on L69's, and a bunch of other GM vehicles.
Edelbrock has some aftermarket ones, but their weird letters, ones that i've never seen in the JY. Look 'em up on the chart to see if they'd be better than what you already have, and would be worth buying. Otherwise, go JY diving!