360 renovating/tuning

Max boring the block is asking for heating problems in a street engine. Keep the bore to the least that is possible and still have good cylinder walls. That is unless you can find a replacement or service block with extra thick walls. Those blocks do not have the displacement cast into the side by the motor mount bosses.

Indy heads can be problematic due to casting issues, porosity and other troubles. Edelbrock heads are much better out of the box. Kevin Fontenont is in the process of making some new aluminum heads for AMC. See his post on Facebook. Original 291C heads are darn good heads as long as someone didn't crack the heck out of them. There's another later model cast iron head that works well also, can't recall the part number. Maybe someone will add that. Check for cracks in those heads too.

Don't forget that AMC V8 engines are NOT neutral balanced. Everything from the vibration damper back to and including the flywheel/flexplate need to be balanced together.

Good luck.

Seems you have the basics for nice performance engine. With the 360, you generally need to add some compression, how much will depend on what fuel you are prepared to run.

Your best option for an off the shelf forged piston is Wiseco, they come on 0.020" and 0.045" oversize, I would always run the smallest oversize you can, you won't see much difference between these two.

For rods, there are a few options for a stock replacement forged rod, Molnar, K1.

Remember that if you are doing a stroker combination, you will generally need some custom pistons, you can't just increase the  stroke and run stock pistons and rods.

For heads, I think if you can do your own porting, the factory iron heads are a good option otherwise they will probably end up costing you more that a set of Edelbrock heads. The Edelbrock heads are a nice performance upgrade, think of them as equivalent to a set of ported factory heads with all new hardware, of course you can improve them too with porting and other upgrades. Indy heads will be more of a race application, they do make 2 heads, one which is basically a performance replacement factory head and the other is a race head that will need more to make the work, like custom headers. Kevin's heads, saw them, they will be for a serious race motor and will need a lot of other stuff to make them work, I'm going to guess 700+ horsepower applications.

Don't forget you have other options to make power, a little N2O if it's just for a blast down the strip, you can add a centrifugal supercharger (Torqstorm) or a turbo, maybe  two.