I think it would be plenty. Check out what Jay Leno did with one of these engines:
http://popularmechanics.com/automoti..._better_buick/
http://www.myclassiccar.com/MCCTV/20...008/leno.shtml
He put one in his 1955 Buick Roadmaster Hardtop.<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>At GM's Arizona Proving Ground, the reborn Buick turned high 11s in the quarter-mile at over 125 mph--with four guys in it. It was hilarious. <HR></BLOCKQUOTE>