.120. Anything more than that, and you will hit water. However, you can sleeve the block, and go much further. Sleeves are not as bad as they used to be. They use a step type design now.
Bore it .030 over. A 350 has a 4 inch bore. When you go .030 over, the cid., becomes 355.
Go to a local machine shop that does engine work. They will explain the procedure for boring an engine in detail. This is where you will have to go to get your engine bored.
The impala ss LT1 did not come from the factory with roller rockers, they came with stamped steel rockers. If you are installing roller rockers in yours, the common advise is to go 1/2 turn after 0 lash, when the pushrod no longer moves up and down.
ive heard you can go 60 over (.060)
If it is a 94-96 caprice with the L99 you will get a good sound as it is identical to the 350 LT1's. If its a 'box' caprice style 4.3 you may want to go straight pipes.
305 can B beffed up but its small bore limits its hp limits. 350 gives u more hp 4 ur dollars. go with the 350 u will b happer and have a heaver walet 2 carry around.
If your spark plug wires go to the front of the motor and behind the water pump, 99.9% chance its an LT1 (if you're talking the newer LT1. The Older one from the 60's you'd have to run the block numbers)
depends on the car u get the LT1 from. example, a lt1 wiring diagram from a corvett is different drom a cadillac. use this website www.thirdgen.org they have good info. u just have to go to swaps section and on the top there is a threat just on LT1 swaps.
.040 is the best, But you can go .060 over but it may try to run hot in the summer time.No more then .060 cause after that the cylinder walls are to then.
The 305 & 350 are basically the same engine. The 305 just has a smaller bore(3.736 vs. 4.000), not quite the power or torque, but durability should be almost identical. It is more costy to rebuild a 305 than a 350 due to the popularity of the 350. If power is not an issue then go for the 305 if you can get one cheaper. If you want more power, then a 350 is the way to go.
probably fuel regulator go yo junk yard and buy a used throttle body bolts on easy
The difference is the bore diameter, so if you've got a head off you can measure it. A 350 has a 4" bore, a 305 is 3.75". Another possibility is to write down the letters and numbers on the identification pad just in front of the right-side cylinder head and go to this website to trace it: http://www.nastyz28.com/chevy-engine-code-stampings.php