Trying to decide what I have

[Old Radio Tech]

1960 283 with iron 1960 heads. measured valve diameters at approximately .34" Trying to decide if it has a cam and solids. Doesn't make noise like solids but I can't compress the lifter manually pushing down on the pushrod after removing rocker, even after sitting all night. Has intake valve stem seals I'm unfamiliar with. Rubber cylinders with round metal band at the top and flat wider band at the bottom. If I rotate the engine around and check the lash, all pushrods will turn with slight pressure and have no sideways movement. Runs very rich. Timing, vacuum checked. new fluids. very rough at idle but smooths out just off idle. Rebuilt carb, new distributor, hoses, etc. Timing set at 4 deg BTDC. Quadrajet. Idle screws almost all the way in. compression 140-152. Could be high because of carbon buildup?