Run a 180o T-stat for best running in summer and winter. 165o tends to make it run a little bit rich waists fuel and may interfear with drivability. If it runs hot with the 180o then u have other cooling problems clogged radiator Bad fan clutch or leak.
Yes.
yes
yes but it has to be 83 or newer
To build a 383 sbc (small block Chevy) a 3.75 inch stroke 400 sbc crank is added to a .030 inch overbored 350 sbc. This combination has never been released by Chevrolet in a production vehicle . So the answer to your question is no .
No. The 400 is externally balanced and requires it's own flywheel.
No. Standard 350 engines have 4.00" pistons, standard 400 pistons are 4.125".
It should work well.
its about 350
.030
The main journals need to be turned down.
It would depend on the degree thermostat installed, probably 195 degrees F.
YES. That is a direct bolt in.