Only thing that motor will do is lighten your wallet a bunch.
And likely not perform any better down low where you need it.
And likely not produce any more vacuum for your booster.
You something milder than can be swapped easily and be upgraded in the cam selection later if you need it.
Your tire/gear combo needs a low rpm grunt motor.
This will fit the bill.
http://www.jegs.com/i/Chevrolet+Perf...30283/10002/-1
Or this.
http://www.jegs.com/i/Chevrolet-Perf...30282/10002/-1
And only 5 grand cheaper.