Yes this is possible since they are both LT1 style engines. Everything will plug in the same but you will need a PCM for the 5.7L or get the original reprogrammed by someone like PCMforless.com to correct the extra fuel needed by the larger engine.
Use an exhaust made for an LT1 engine the blocks are identical it is the insides that is different. Will bolt right on.
There is one before and one after the catalytic converter.
Yes it will bolt right up to it.
You need a special tool, a harmonic balancer puller. Go to Autozone and they will usually lend you one for free. VBD
The fuel lines around the filter; you will need an adapter.
.043
.43L. 1000ml=1L
Don't know what year you have but some sensors are temperature sensitive and you should run a 195 degree thermostat.
It should be on the front of the intake manifold directly above and behind the water pump.
as far as i know the 4.3 is a v6 which is actually based off of the 5.7. gm just cut 2 cylindars off if there is a difference it will be the heat range on the plugs for your info, the Chevy 4.3 ltr in a 94-96 caprice is a 265 v-8, do some research before giving info on engines you know nothing about. oh and by the way, the power rating in a stock 4.3 v8 is higher than a stock 5.0 and also the correct answer is NO, the spark plugs are no different than the 305 or the 350.
4L60/E l
43L of 18-k gold