350 block into a 327
I agree with the k.i.s.s. method. If you're on a budget and money is an issue, maybe it would be simpler to ust clean up the 350 block and bolt the 305 heads on it. The smaller combustion chamber would boost compression without having to re-work anything. Its the most economical way to get a good running engine. Then save your dimes for a point down the road when a more radical build is in the budget. Good luck with whatever you decide to do.