Big block B or RB ?

I had 3 over the last 10 years this one a 456 stroker 4.402 bore selecting right cam for the engine and deck height is a factor the block or psiton height is a factor you will need a good machine shop . Currently running a voodoo cam straight up 60301 I'm not happy . Rough idle from 1000 rpms and top out at 4500. I drove on highway to work for about a week got up to 110 mph last day after that idle got worse so I jet up the 800 cfm eddie new jets new meter rods rich up figured was running lean . I spent 1699.00 machine shop work last summer the check everything and main bore line bored it 1/2 main studs decked the block balanced cut the 3.75 crank etc.. also larger oil pick up hole to 1/2 , 7 qt pan .. KB280 pistons from Hughes racing .. The block is a 400 RV truck block bored out .060 over .