Jeff, good choice we been running a crate 502 in our boat for the last 4 years. We are running a 850 holley mech sec., full MSD non marine ign., Lunati cam part# 00024, Crane Roller Rockers, Doolley 10 qut pan, Holley blue pump w/reg. boat runs 14 mph faster than my stock 454/330hp ran and this was on GPS. Good Luck