Should have given full history: first heads with a factory built HAPI 1835 cc engine, valve guides were too tight, had to ream them. Messed up the plug threads; reamed them out and installed 14 mm inserts. Did this on the following heads too: rebuilt heads from a quality VW supplier: big mistake, lasted less that 100 hours. Final heads from one of the best serving the VW crowd. All heads bored for 92 mm jugs. Swivel foot lifters from the get go, .006 on intakes and .008 on exhaust, 25 hour oil changes and valve lash adjustments. Read the mixture conditions from the plug colors and exhaust piped (4 individual pipes) plus egts and head temps. Compu-Fire on 009 centrifugal distributor, plus an old Whitney distributor advance/retard unit to fine tune advance; and mixture control carb.
Two rebuilds with new cranks and hubs after prop breaks over the years on the HAPI 1835 cc engine. at 1080 hours removed the HAPI engine and built up a GP 2180 cc engine, new case to RIMCO for front welding and super hub machining. Last valve job July ?07 at 1315 hours. Think I did a reasonable job of maintaining the beast. Wish I had the Bug Pack aluminum crank case in the KR2 that?s in my 1970 bus, 69 x 90.5. The case is set up for long throw crank and 92 mm jugs. Have over 40,000 miles on it and a lot of mountain driving here in eastern Oregon (the southern Blue Mountains) with oil changes and valve lash check one a year need it or not. Oil pressures are as new.
