I'll add another possibility to the mix. When I built a B18 for my '68 144S in the late 1980's I decided to prepare a head in advance and then tackle the bottom end when I had the use of the shop over a weekend. My boss had a pile of heads in a back room for me to sift through. I was hoping for a FI head -- E or F but found none. What I did find, however, was a carb head (had the locating rings for the intake ports) but did have the 44mm intake valves. From a Canada car perhaps? By measuring the deck height I determined it was a low compression head (in the 8 point something to 1 ratio). I milled it .125" to bring the CR up to 10 point something range and cleaned up the exhaust port inside radius and port matched the transition to the FI exhaust manifold I was using. It all worked very well and later I moved on to a '69 144 and moved the head (and K cam) over to the B20 block. I'D ALSO LIKE TO POINT OUT---in the Volvo "stage" offerings the highest HP combo listed was 190hp using a stock B20E/F exhaust manifold with the section before the front pipe merge extended 4 inches. I have a copy of some (from the late 1980's) of that and can e-mail to anyone who would like a copy. fastforwardphoto(AT)yahoo(DOT)com -- Dave