www.jegs.com look under eagle for stroker cranks. they make ones with 350 main journal sizes aleready. And ARP makes a rod bolt thats shorter so you wont have to clearnace your block.
by making a 350 a stroker your improving volumetric effiency of it. you get extra cubes, and more volume in your cylinders. which equals power.
if you want one, dont fool with a stock crank. buy a stroker crank, cast steel ones go for under 300$ and arp stroker rod bolts.
and its really that simple. cheap power and bragging rights