A 12 cars factory redline

[John Brown]

Originally Posted by MarcDant

Was a 273 commando a solid lifter 275 hp. Thanks

Yes.

"Though the Power Pak 273 used the same block, main caps, forged crankshaft, forged rods, cylinder heads, 1.78/1.50 inch (I/E) valves, adjustable rocker arms, exhaust manifolds, and oil pan as its plain vanilla two-barrel sibling, Chrysler upgraded everything else. With its 480-cfm Carter AFB four-barrel, domed, 10.5:1 pistons, hotter 0.428-inch-lift solid cam, chromed 10-inch air filter, dual point distributor, and free-flowing single exhaust system, the Power Pak goodies bumped the two-barrel mill's 180 horses at 4,200 rpm and 260 lb-ft at 1,600 rpm to a much more exciting 235 hp at 5,200 rpm and 280 lb-ft at 4,000 rpm."

motortrend.com/how-to/testing-mopar-273-power-pak-dyno/