well just got my new pfaff motors . they now are talldeck blocks with cmi headers anyone have an idea if i might have a clearence prob . pfaff was told what they were going in , any insight . side by side application .

rob,when i went from a std deck to a tall deck i had to open the exhaust holes just a touch,not a big deal.i also had cmi headers.

great . how much wider is a tall deck , 1/4 inch i just got done looking at my old motors in boat and have at least 1.5 to 2 inces between manifolds ?

Rob, youll probably find that you will need to do what Mike did, if your tails run all the way thru the transom.

standard deck on the ole engines are 9.800..tall deck is 10.200 all the way up to 11.100+ depending on the mfr..so it could vary depending on what your deck height is..

rob,whats the center to center distant between your drives?my distant between my drives on my 10meter is 33"which is tight.i had to have spical manafold made to fit.

Check your center to center measurement. Fitment will depend on a few things. The specific cylinder head you are running will have a big effect. Most aftermarket heads have raised exhaust ports. Most are in the .400-.600 area. The exhaust itself will also effect it. I can tell you this much. A pair of tall decks, with .600 raised port heads and E tops needs at least 34" center to center to fit side by side.
Eddie

dart pro one heads .e tops .headers . pfaff says hell get custom inside headers if need be

Do you know the engine center to center?
Eddie

Rob,
AlsolLook at this thread, I think 88 bullet put tall decks in, tight fit.

http://www.offshoreonly.com/forums/f...e-restore.html