[Jack21]

If I were building a 427W, here's what I'd look at. 1) FMS 4 bolt, 9.5" block. Can be bored 4.125. If you'll be twisting it 6k - 7k, use 2.75 main journal size. CHP uses 2.1" rod journals on their strokers. 2) 4" stroker crank. Same crank as the 408, just a bigger bore. 4.125 x 4.0 x 8 = 427ci. (No that's not how you plug it into the formula, just making a point) Even aftermarket aluminum Windsor style heads are pushing the envelope breathing wise with those cubes. I'd try a set of Blue Thunder aluminum Cleveland heads, or as another option Australian C3V Cleveland aluminum heads. 3) A hydraulic roller cam.

Don't understand the electric oiling system. Canton road race should be enough.