The R5p7 deal will do it easy. With the NASCRAP rules the Penske motors were making north of 850. You can buy complete motors with inconel headers and all for 7 to 8 all day long. Yeah they need fresh pieces but the hardware alone is worth that. Larry Smith tells me that Nascrap have a rule where by the top of the cylinder port measured from the centerline of the crank is limited. Take away the rule and do set from scratch and he says you might get close to a grand......Todd