Your max rpm for your big block????

moper....
If you grove the #4 journal of the cam so you have full time oiling then you have to install oil restrictors in the oil passages in the block.
In my max performance mopar big block book, it was suggesting to use spray bars as a means for additional oiling and also as a means of cooling the valve springs.
I guess it only takes about 5 pounds of oil pressure off your total oil pressure.

Andy finkbeiner also states in his book that when you grove the #4 cam journal you give even less oil to the #4 crank journal.
He has seen an engine with this set up spin the number 6 and 7 rod bearings in a dyno test, even though the back of the engine where the pressure was being measured showed a constant 70 pounds of oil pressure.
The more power we make the more problems rise up with stock blocks.
Most aftermarket blocks have addressed all these problems and are made with all the fixes already in the casting.

If you think about it,all the new parts made in the last 25 years or so have covered every part of the engine with new up to date, better performing parts that are starting to leave the factory castings in the dust.
Don't get me wrong,factory blocks are a great starting point for good street and drag engines, but if you have the money, you can over power a stock engine block with just a set of modern cylinder heads ,especially if you have already built a maximum effort engine with stock heads.
Thanks for the info and yes i could do that, but it turns in to a balancing act that in the end cost more time and money then i care to spend.
If i am going that far,then i will get an aftermarket block.
Any body have an extra 10 grand so i cam get started on my 850 horse big block???????

Ps Hemidenny..... I am building a 400 big block.