Realistic valvetrain expectations.

AndyF said
A 600 hp pump gas 400 inch Mopar is possible but you might not enjoy driving it on the street. For a street car I'd put a stroker crank in it and shoot for 600 ft-lbs.

I'm glad you chimed in Andy. I've always liked liked your posts, and admired your work with these engines. I was hoping to keep it at 400 to keep stresses on the block low(side loading, piston stability, piston speed, bob weight, ect), and use either Pro-gram or BCR products to tighten up the bottom. Info from you and a few other guys has me confident with the oiling mods required.

My knowledge stops at the BBM valvetrain. Obviously cam profile and valvetrain weight contribute to the required valve spring pressures. I'm also very aware of the compounding effects of geometry and friction (the viscous cycle). The more things are offset...the more side loading...the more spring pressure required to fight the friction...the more friction created.

Is it just an architectural issue (port, intake, valvetrain, ect) that I don't see "in between engines"? Plenty of mild and wild builds, but not much in that 1.5hp/ci that I'm looking for. Thanks