Codes on one of the blocks:
K114
9780562

On the other block:
BO87
140

The guides are definitely knurled, clearer picture here - this is from the other head without the notches to the side of the guides:



So new valves, and new guides are recommended... it would seem silly not to do the valve seats then.

Does anyone have an opinion on the Kanter kits? Overpriced, good quality, etc? They seem to be a 'Marmite' company. Their complete kit for $1499 (fair bit more than I wanted to spend) contains the following:

• Pistons
• Piston ring set
• Main bearing set
• Rod bearings
• Connecting rods
• Cam bearing set
• Gasket set
• Timing chain
• Cam gear
• Crank gear
• Cam shaft
• Push rod
• Rocker arm kit
• Valve lifter
• Intake valve
• Exhaust valve
• Valve guide
• Valve spring
• Prelube
• Freeze Plugs
• Oil pump

I haven't determined whether the pistons need replacing, but as one of them has seemingly shot into the side of a cylinder, I would assume so. Also, my cam shaft has some chips but only on the edges of the lead up to the peak. The center width of the cams are pit-free. So the cam may or may not need replacing. Everything else in that kit I think I'll need. Although there seem to be no valve retainers or locks, only the springs.

... would I be better off ordering individual components?

Thanks again, you guys are great