You should look up on CL for someone offering automotive work that doesn't change $120 per hour. I'm sure they'd help you find a 350 for you and replace your 305. Identical motors - all your stuff will bolt on to the 350, provided it's 80's-90's vintage. You could even look to pick up some 062 or 906 casting Vortec heads and bolt them up while you're at it. Keep your CCC system, that way you don't have to buy a carb, distributor, or transmission controller.

My two cents.