It is possible that some contact was made. If it were me, I'd pull the head and take a look see.

The year doesn't really matter on the pushrods. They come in .060 increments. I would recommend checking the valve clearances and make sure you have the correct length(s). Here's a link for setting preload and checking clearances FE's That Bend Push-rods, A Dirty little Secret .: Articles

You'll need tool T58P-6565-A to bleed the lifters down.

You should either get an aftermarket timing set or a factory set from 71 and earlier. Both will be straight up, or in the case of the aftermarket it will often have 3 keyways (4° retarded, straight up 0°, and 4° advanced). The latter years, 72 or 73 and on factory sets were retarded 4°.
You generally want it straight up.