according to the Nebraska test the compression ratio should be 8.34 to 1 and have a static compression of 225 psi . I run a autolite 3116 in my 450 which has like compression and a 29 venturi which gives it about 71 hp . set the timing dead on 25 degrees at 1600 rpm and run 110 octane any less on octane may melt the piston top . have fun . the gap on the plug is .025 and will cause a miss in the engine if opened to much more because of cylinder pressure . put a heavier spring in the governor it will operate a lot sweeter at 1760 to 1900 rpm . hope this helps
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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