long bed to short bed- fleet side

[nikwho]

I'm always one to say that you should hold out for the truck that you want instead of trying to chop something up to what you want. I am in the middle of chopping the bed of my '59 down by 19" to make it a short bed. I am being haunted by a steal of a deal '66 thats a long bed. I'd love to buy it, make it a short bed, lower it and drive it. no big nasty V8, I like the I6. I just know that i dont really want a long bed truck. How hard is it to chop down one of these fleet side long beds? What is the difference in bed length(in front of and behind the rear wheels)? Thanks guys