(Newbe) 273 to a 340 and tremec 5speed swap.

so what should i do, everyones telling me different things and im just confused and a bit overwhelmed. i have 700 in 273 parts already from before i had go pull it.
So what do you have for the 273? Everyone thinks everybody wants a drag racer. It just is not so. Make a nice driver out of it. That 273 is sweet. No different trans, no different rear. All money holes you do not need to go down. It just snowballs to ridiculous.