On the engines that come with 2 heads..high and regular compression....How do you tell tell the difference..I notice
that there seems to be a difference in the fin height, but don't know if this is the way to tell.
Also..on the older engines with the square venturi..was there any kind of gasket between the insert and the venturi..like an O ring..but of course this is square...I don't remember seeing one, but someone told me absolutely,positively,without a doubt..There was a gasket!! With my memory, I didn't argue..Anyone know??