Join Date: Dec 2008
Location: Lloydminster AB
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he is what has been found so far by the guy that actually performed this swap (blackgmc99). he used the ultra 680 engine, clutch, coils, carbs, exhaust, mounting plates, and belt. the engine is pretty much a drop in system, used the air box from the xlt (only if an sp w/ 38mm carbs) and the ultra's cables for the choke and throttle. the engine sits back slightly once its in the sled, so the belt from the ultra is used. the only semi-issue found (so far) is the cooling system. the 680 case reed and the xlt mono-block have different cooling attachment points and hose sizes. just make a closed, sealed loop. with the testing done so far, the xlt coolers have been plenty.
in the sled
in the second picture you can see how the cooling system was attached on the monoblock. this pretty much just got reattached to the ultra engine.