Running a 400 big block? ?Then whats your combination?

The 400 i am buying is completely rebuilt with 30 over pistons.
It has never been fired and sits on a new engine stand.
It was built in 1992 and has been in dry storage.
There is no rust in the engine and the oil pump was cranked over with a drill to oil everything up.
I am thinking of taking it apart and checking everything out and installing a set of 30 over keith blacks.
The crank was done,block, all bearings,heads,new everything.
They spent $1800.00 on the rebuild but it was all stock with a economy cam.
It is real easy to build a 451 BUT, if everything checks out, it only needs a good piston and cam with a little bowl work to make it a great engine.
I most likely will get arp rod bolts and shot peen the rods.
It has the same stroke as a 383, so i would think it would scream.
It reminds me of a 340 as far as the stroke being less but the bore being even bigger then a 440.
If i go to a stroker crank,i think it will cost almost the same as turning a 440 crank and hardening it after the cut.
If i go that road then it will be a 512 cube engine instead.
If someone built a 451,how much coin did it cost in the end????????