Oh dear God! 318 stroker

Your cubic inch requirement means a std. bore, up to .030 bore. Hope you have a Magnum block..... What you ask of can be done. Hope you have friends with machines, you're going to need them. I've done this very engine. If not for thlose friends with machines, it WILL get costly. We started with a std bore 318 Magnum block. 360 stroke crankshaft(3.58) with 318/340 main journals can/could be had. Std length connecting rod. Early 318 pistons used for the compression height. Skirts milled off to clear crank throws. Basically made a gen 3 hemi piston out it. Deepen the valve reliefs a little after machining tops down for street friendly compression ratio. Ran lightly touched Magnum heads. Air Gap Magnum intake. Only cam we had around was an old Direct Connection Hemi grind flat tappet. Long tubes and a ThermoQuad. Damn little thing ran like a scalded dog. Went into a 70 1/2 ton D-100 with a 3000 convertor and 3.91 gear.