Crossover Tube and Valve Spring Pressure Questions

Well the trans went out on the way home from a buddies house last Sunday and at the same time the current engine started huffing a considerable amount of oil out of the exhaust and breathers. then my intake bolts pulled the threads out of the heads. all In one day.

so Im building the engine I have in order to get the car up and running again which is why it's a 318 and not a stroker 360 or 340 or something like that. and to get the power I want out of it and to have a little fun too, it'll need to spin a little higher. (I also really love a screaming small block)
what a series of unfortunate events!

understandable that you're looking for power up top. the heads would support that, and if you've got the compression i don't see it as a problem.

i think there's better cam choices, and intake. but if you're working within those parameters then it is what it is.