hey all. I have a Dauntless 225 from a commando. I looked the casting number up on earlycj5.com and matched the casting number with engine description. the number is 1358435. im told that this is between a 1963 and 1965 engine. the head numbers match for one of the heads (1358676) but not the other (992326). I beleive that the head with the 992326 casting number may be from a later Dauntless v-6 engine. I believe this because one head constantly does not have compression. The rocker arms are interchangeable and the best set of the rocker arms does not work on this head. Can anyone help??????

Engine: 1358435
Heads: 1358676(original) and 992326