If you grew up when 12:1 compression was driveable on street fuel then you may remember the sounds of high compression, small displacement V8's with high overlap cams cracking and snapping through small exhaust pipes. I like that sound but I would never call it a rumble.
Good cylinder heads are the key to good power. In the smallblock family, L31 heads were among the best flowing stockers. LS engines as a group are even better. But there's much less need for those old rumbly cam designs when the heads themselves flow well. Late engines also use roller cams which can have faster valve opening and closing rates. This also makes an old, rumbly cam design less necessary. For example, I have a 99 vintage smallblock 302 that makes 330 hp / 350 tq but has almost no cam sound. I opted for a Flowmaster 50 series to get some exhaust note with that one.
There are over the counter crate engines that will provide the power you are looking for. They have list prices in the $5000 to $6000 range. This article is good reading if you're looking for alternate routes:
http://www.superchevy.com/how-to/pro...-engine-build/
It's old so the prices may not be as accurate...