A big block will fit into a 1951 chev truck. But with quite a bit of mods. Motor mounts will have to be fabricated or purchased, the cooling system will have to be upgraded, but the biggest challenge is the steering gearbox. It will need to move about 2 inches to the left in order to clear the engine and headers. There is a ton of work that would go into this swap. But it can and has been done before.
No
Yes, but I would use the C6 tranny too.
Yes.
I recently had a 1990 Chevy lumina apv 3.1L engine put into my 1992 Pontiac transport, if that answers your question.
yes, same motor
153426
Not without fabrication.
What_is_the_push-rod_placement_for_a_1996_lumina_3.1_engine
No, not without major fabrication.
If they are both 3100 engines...yes. Direct swap. The only thing you MAY have to change would be the motor mounts.
take it to a mechanic
Around 3100-3200 lbs