The year and model would help but in most cases it is fairly easy.
Drop it in
Yes.
No.
You could get a 305 V8, 350 V8 and V6 ;; your mom needs chapstick
yes
Change motor mounts and install...
the short answer to this question is yes you can. there are kits to help you.
A V8 engine is put in a Chevy Astro van by removing the existing engine and removing all unused accessories. The engine can then be put into place, bolted to the transmission, and everything hooked up.
2.8 & 4.3 V6. You can also install a small block Chevy V8.
Chevy already put the 5.3 Liter V8 in the Impala in 2006. It makes 303 H.P. Putting a 5.7 could be done, but the expense would be great. I would just look for a factory V8.
There is no Chevy 4.3 V8. The 4.3 is a V6 followed by a 4.8 V8
i have a transmission i took off of a v8 350 motor and i wanna put it in a v6 motor. will it work? both are automatics