[Aussie Mike]

I always thought the Boss was the windsor block with Cleveland heads on it. I've been looking back through my Ford books and there actually was a Cleveland Boss produced in 1971. It had a 4 bolt bottom the same as the Cobra Jet version but with caps selected for hardness. The Heads were the same as the 4V and CJ but were machined for screw in studs and adjustable rockers and also ran heavier springs. The crank was cast Iron like all Clevelands but was selected for high nodularity. They had shot peened rods and better quality bolts. Forged 11.1:1 comp pistons. Cast aluminium manifold and "ram air" air cleaner.

All in all the motor sounds like a real factory hotrod. The later 72-73 HO motor shared many of the same parts as the Boss but ran a milder cam and only 9.2:1 comp.

Cheers