Cheap, fast and reliable. Everything you said in this thread can be summed up with those three words. However, it is impossible to have all three. It's only possible to have 2 of the 3 words. Which 2 do you want?
Dropping a big block into an A body is not a cheap project. However, you clearly indicate you don't want/have a lot of cash to spend. As others have suggested, hop up the 318 and keep that big block in the corner until you have the time and funds to do the project.
