4.2l V-8
Posting Guru
Joined: Mar 2002
Posts: 2,070
Likes: 2
From: Boise, Idaho
Not common. It's the same block as the 302 but it has a smaller bore and as a consequence has smaller valves. Valves on most heads from 289's and 302's won't clear the walls of the 255, so you'd have to stick with the stock heads. Personally, with the high price of gas, I'd consider the 255 a pretty good candidate for a economy engine. Best of both worlds.
Posting Guru
Joined: Oct 2003
Posts: 1,955
Likes: 0
From: Quesnel, BC, Canada
*take this as a guide, but MAY not be 100% accurate, the book its taken from has a couple 'typos' (wrong info)*
From George Reid's "Ford: High Performance Engine Parts Interchange" book:
255 info:
Bore x Stroke: 3.68" x 3.00"
Valve size-
-Intake: 1.78"
-Exhaust: 1.45"
Horsepower: 115-120@ 3400-3800rpm
Torque: 194-205 @2200-2600rpm
Rocker Ratio: 1.73:1, bolt/fulcrum non-adjustable
Compression: 8.2:1
built 1980-1982.
Everything else is basically 302 equipment.
From George Reid's "Ford: High Performance Engine Parts Interchange" book:
255 info:
Bore x Stroke: 3.68" x 3.00"
Valve size-
-Intake: 1.78"
-Exhaust: 1.45"
Horsepower: 115-120@ 3400-3800rpm
Torque: 194-205 @2200-2600rpm
Rocker Ratio: 1.73:1, bolt/fulcrum non-adjustable
Compression: 8.2:1
built 1980-1982.
Everything else is basically 302 equipment.
