Re: How much can i get outa a small block?
327-difficult, expensive, not so great on the street.
350-difficult, expensive, a little tamer for the street, but still a lot to handle.
383-easier, still expensive, better than above.
400-optimum, may want to opt for a dart little m or brodix for a block.
You can make a 600hp motor fit under a flat hood, you don't need a massive intake, 12 carb spacers, and multiple stages of nitrous.
Go for a 383, 396(sbc), 400+, those would be the easiest platforms to build power with, but it won't be cheap for 600hp, you need great heads, well though out roller cam, port matching...
The only Mustang I'd ever own is a Fender.
'68 333" Camaro
'14 5.0 Mustang