Another low budget 360 build

I think either Comp is fine. The Lunatis recommend dual valve springs that require head work so if the heads are not going to the shop, I'd skip them. I have an '87 360 in my truck. All stock long block with the XE262, 901-16 springs, the MP windage tray, recurved distributor, MSD, Performer intake and Edelbrock carb, and cheapo headers. I did not rebuild anything, block's never been out of the chassis. It's a great all around package and pulls like a freight train off idle. I pull a car trailer and plow an 8' blade uphill when it snows with it. With the better pistons I'd go with the XE268 and the 901-16s. The stock rockers will work, but you will need to measure for, and order, custom pushrods to get the right preload so be prepared for that.