The plugs is the same gap but you can go colder on the plugs if you won`t and the timing is about the same my 572 run the best at 38 degree but at 35 degree about the same a lean out valve is a must to warm the car up. GOOD LUCK
34 deg timing, keep the gap .035 or less. I lost some good power and tyook me forever to figure out it was the plug gap... They were .045+ slowed down a bunch... 850 HP engine with a toilet injection.