Chris I posted on YT and they said it would be easier to get ahold of you on this forum.  John S. pretty well answered my question but you wrote the article so I will ask you anyway.  I was reading HPO mag. the other day and came across the 88 article.  I just wanted to get this straight in my little brain that in 1945 they started to make the 88 with streamline tin and soft plug motor, then after June 30, 1948 they started making the 88 with fleetline tin and a non soft plug motor?  Thanks in advance Chris!   Steve