So you want 2 go Big block...Read this first!

Also a 440 out of a motor home is a far cry from a 340.

a 340 is way better than a stock 440 motor home engine
Just out of curriosity why would a 440 out of a motor home be a far cry from a 340?I think the late modle 340's where not as durable.Think about the fact that a motor home is built to go long distances...and hall alot of weight.I just disagree.