12 Second N/A Slant 6?

PowerWagon896 said

Porting has nothing to do with lift & I don't consider that exotic.

Why are you quoting stock head lift?

I'm willing to spend $$ for run of the mill machine work to increase lift capabilities.

I'm talking about aftermarket springs/retainers, possibly cutting the seats for the botton retianers.

None of that would be exotic.

I don't want to spend big $$$$ on longer stemmed valves, special rocker arms or such.

For some reason you don't seem to be taking me seriously or you assume I am not knowledhgable W/modified engines.

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you can run more lift than the engine needs... lets just put it that way, .550 is easily had for clearance, but not getting that lift to the valve.

the problem is stock rockers are 1.35-1.42 lift ratio which drastically hurts duration to vavle lift ratio's. for the low rpm you want to pull your gonna be down around 235* or less @ .050 duration. so getting a lobe big enough get lift requires new rockers or as i may plan 1" lifters.

i bang mine of 6 grand with a stock bottom/ .080 over cast flat top pistons with no issues and can take a 150 shot all day.

with the short rpm constraints i think that converter is way to loose BTW, but without testing it you'll never know.