[Bob Broberg SPF667 460BB]

Fitz, there are many 514s installed in Superformance cars. Their owners are pretty vociferous on the SCOF forum. It's a great motor. If I were to replace my 460 that's the way I would go. I have an old 1972 short block bored a bit and 10 to 1 compression with a 114 degree cam lobe separation (not "lopey") and not radical cam lift and duration. My motor can run all day long on pump premium. The new 514 with the SCJ heads rated at 550hp has 110 degree (lopey) but should hold up fine. I get 15 to 17mpg on trips.
Bob