This is a shameless plug for a good friend of mine. Every time I go to assemble a Grey Motor I have difficulty finding a good set of head bolts. They are usually corroded, stripped or otherwise unusable. Procuring a good set of "correct" bolts is getting harder these days.
I helped him develop a set of good quality Chrome Moly head bolts for Grey Motors. He sells them on eBay as complete sets.
See here:- https://www.ebay.com.au/itm/167675094963
Any comments are welcome.
Dr Terry