Therm:
I agree its a Crossflow, however extension casting are the same for the kit numbers 506/507 regardless of the year of the motor ( crossflow or looper) through 2009 The only difference between the two kits is the bolt length in the rear. The kit I have will work fine. Check
www.Baymfg.com for specifics. I have installed two and had have no issues what so ever. One on a 1984 235 and the other on a 1994 150. Check my gallery for pics.