hi i have some question for my engine i have 350 tbi as i been told

first one is how much can i bore out the cylinder now i dont know how Mach it is boret but i sow the piston size and it write on it 20 and when i try to make polish in the shop he tell me i cant make it 20 or 30 must be 40 and i didnt see any damage with the liner and the car was working smooth so if i jump to 40 ill i have prablom with over heat? so what is the maximum bore i can get

second one is is there a big different between c4 heads and the 350 heads exapet that pne off them is alumimom and the outher one is iron ill one off them have more adventg?

third one is im trying to get 750 curb and i need good cam for daily use which one is good

and im welcoming any suggesting

 

i cant understand half of this, please correct your spelling please

 

i have some questions

1- how much can i bore out the block .. when i remove the piston i see the size and it write on it 20 and when i try to make polish for the liner in the shop the mechanic tell me that i cant bore it to fit piston size 30 i can only bore it to fit piston size 40 and i didnt see any damage with the liner and the car was working smooth so if i use piston size 40 ill i have problem with over heat the engine ? and what is the maximum piston size i can but on it

2- is there a big different between c4 heads and the 350 heads exapet that one off them is made from alumimom and the other one is made from iron ill one off them have more advantage then the other one ?

3- im trying to get 750 curb and i need good cam for daily use which one is good

im sorry for my English

 

If you are swapping to carb, 750 is too much - look at 650.

The machine shop will tell you what you need as far as boring goes - let them do what they are trained to do.

No F-body ever came with a 350 TBI - so you better make sure it's a 350 before you bother - get block casting numbers (driver side behind the head) - if it's a 305 instead (which is what I'll bet), then I wouldn't bother getting anything done to it but swap it for a 350.

 

The big difference is there are a bunch of different 350 heads out there. If your engine is a 350 TBI, then the aluminum Corvette heads are a little better. But, the aluminum Corvette heads aren't much better than some cast iron 350 heads. See response to "3" below.

If you are going with a carb, then I suggest you get Vortec heads and a Vortec carb intake manifold. In order to suggest a cam, we really need to know what block you have - whether or not it is a 350, and whether or not it will take a factory roller lifter cam. If you get the casting number off of the block, then we can go from there. Sometimes the last three digits of the casting number is in large numbers on the side of the block, so you might want to look there first.

Where would you be getting your parts?

I'm sorry for the response you got. I do not know what your native language is, but I am betting you speak better English than we do your language.

 

thanx both camaronewbie & five7kid for ur help i think i ill buy the part from ebay becus im from place no one here have ider about chevy engine or part so im left alone to finish my car .. i read on the block the lift side from the back say h-4 then down it say 627 (and every where is writing 627) ?? so wich block is in my hand 350 or 305 .. i ill try to take photo and upload it..