[rollinhard]

The thing with these motors having the taller deck height is the exhaust is different aswell so header selection might be limited. If this is all your doing for a build i would personally find a cheap 454 and do that up for the price of building it it would be the same or cheaper and yeild you more power i would think. The rotating assemblies r heavy and slow reving in these unless you put standard pistons in then you need either new rods or a crank to make up the difference and the costs go up from there. If your really want ot do something with it buy a 4.25stroke crank bore it .060thou to 4.310 bore then put in a set of 6.8" rods and pistons with a pin height of 1.27 an d you will have 496. The cast cranks off ebay r cheap and rods arnt bad either. the piston r off the shelf. Just an idea