Problem was that the flexloc nuts Accurate sent with the heads are too wide for one post of the rocker blocks. You have to grind away some material or find 7/16 or smaller facet nuts.
Here's a set of -50 heads Lakeside Bill built for me in 1988. Intake blocks are -48, exhaust block is aftermarket HDC. Check the nuts, one set has 7/16 hexes, the other 1/2" ! Old Bill was trying to do everybody a favor and build them cheap. He helped alot of people get started with the hobby. Actually both style of nuts allow you to use a regular socket to tighten them. We tighten them to 15 ft. lbs. Clymers book says 18-20 ft. lbs. H-D doesn't specify a torque spec that I know of.
You don't need the intake oilers with lead-free valeves and seats.
The intake (-48) rocker arm was stiff at about mid-swing, even so, I put at least 23,000 miles on these heads without a problem. Rarely would my solid lifter pushrods need adjustment. I checked them every oil change.
This is a factory installed felt. It looks like two compression divots near the center of each felt. Wonder how they did that?
Here's new felts installed. First I traced the outline and inlines of the felt , removed the felt and applied a line of 3M Super Weatherstripping adhesive #08008 to both the back of the felt and the cover, comes in black too, instead of yellow. NAPA had it.