bkniep,
I have had big blocks and small blocks. I currently have a SPF with 392 / 440HP. Roller Cam setup, MSD electrics. This is a very streetable engine and requires no maintenence except changing the
oil. Believe me, it sends the SPF down the road fast enough. If your racing (serious) maybe then move up to more HP. But for street, this is a good engine. Idles great, doesn't load up and has no overheating problems.
One of the guys in the forum named Hal has a SPF daily driver and I think he has over 70,000 miles with no problems. Not bad for a crate motor.
Good luck in purchasing a SPF, new or used it will be sweet
This engine will get you in the high 11's with street tires once you learn how to launch it.
Just my .02
Mark