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.
2.8 & 4.3 V6. You can also install a small block Chevy V8.
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.
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