modifications to replace the hard to find original cylinder head with the readily available 8n1188 cylinder head that I believe is manufactured in China but seems to be of good quality. all of the parts I reference here are readily available on eBay. the cylinder head shown here was purchased as a blank cylinder head for 800 bucks and that included shipping by truck to my door. it includes all of the soft plugs, pipe plugs, valve guides, valve seats already ground. all I had to do was swap over my valves Springs, and injection pre-chambers. alternatively the same part number head is also available on many places on the internet, as a loaded head that includes new valves Springs injection Chambers and it's priced around $1,500 to $2,500 bucks. but I believe in either case you'd have to make the modifications that I've included in this video.