I have done what you are thinking about; cutting on a table and and cleaning
the web out with a sawsall. It is much harder than it looks. Getting the
the sawsall to to go straight down the middle without gouging the sides is a
I will not be doing it again...
As others have said, you can joint with a router, or with a hand plane for
that matter; but neither is easy. Since the wood obviously will not bend to
conform to inperfections, you had better do a great job or you will see it
as gaps in the glue joint. Perhaps that will not matter to your project.
I guess if it were me, I would save that piece of wood and buy the right
stuff. (or borrow some time on the right equipment.)