360 heads on a 318, I know it has been beat to death...

No, you should read everything. The hard part is deciphering whats helpful, and what might not be. If you mill the deck surface of the cylkinder heads more than .020, you will need to mill the intake gasket flange on the heads, or the intake itself very close to the same amount for the intake to seal properly. IMO, I would mill them further than .020, because any rise in static compression will help in throtle response, torque, and horsepower. The heads need what they need. I always replce guides, mainly because the good machines use a non-tapered pilot to index the seat cutting bit. The straighter and tighter the guide, the more acurate the seat. The better the seat, the more power and life you get. If you have unleaded seats factory, you wont need them. By installing larger than stock valves you can avoid installing seats in some instances. Install 1.65 exhausts. It wont hurt you at all, and will mean the new seat will be up in the chamber, instead of sunk as a 1.60 replacement will need to be. The further out in the chamber a seat is, the more power it will make. Hence new seats when needed. The guides will need to be trimmed down on top if your shop uses guide liners, so the new small seals can be used, and the retainers dont hit the guides at max lift. New locks and retainers are needed because the new valves will use single grooves, and are a different angle than factory..so new retainers and locks go in. Springs to match the cam. 'nuf said. The 5 angle valve job has a "throat cut", and a "chamber cut" in addition to 3 angles. The throat is the area where the bowl turns towards the seat angles. (bowl cleanup is what you said..it's done as part of the valve job..) The chamber cut unshrouds the top valve angle from the chamber surface. A big boost in low lift flow comes from that. Both good for max performance with minimum $ spent. You can use stock pushrods with shioms, or, you can just order pushrods a little shorter than stock. My point was, you will need to CHECK and see how much you'll need to move the rocker to get the right preload and geometry.