Are you allowed cold air ducting to the car? Make an air box with a big radiused velo stack to the entry, snorkel goes to radiator support opening.
Stock oil pan required? Baffle it, scraper, windage tray. If you have the room and ground clearance, drop the sump and pick-up 2-4" and lower the oil level (re-calibrate your dipstick!). If not, add a kick-out on the right side for both windage and more case volume to reduce pressure.
There may be some advantage to putting some water directly to the last 2 cylinders, using the core plugs.
Cam is gear driven? Use an offset key for either cam or crank to retard.
