First I will tell you how it happeded. I was going up a steap hill in 3600 rpm.. Bang and It spudered home.. I changed fuel filter got good gas in it. Inspected all vacume lines. Spark plugs look good. What was the Bang I cant figure it out. Any Ideas???

 

check to see if it blew an apex seal

and repost this in the 1st gen section, youll get more help