The main issue with a relatively high HP 292 is the connecting rods. Stock, they are long and skinny, and not suitable for high HP builds even with good bolts installed, beams polished and shotpeened. With virtually no interchangability of parts from any other engine out there, that only leaves custom rods as the only alternative at around $1000 bucks just by themselves. Add $650-$700 for forged pistons, another $1500+ for the cylinder head, additional block work can be in the $1500 range depending on prices in your area. Tlowe has a 450 HP 292 turbo engine in his street car and is pretty streetable on a regular basis, but pushing that limit to 500 HP and beyond just pushes the cost higher also, but it can be done, just be prepared to spend more at this point.
