I am wondering what the head torque numbers on a efi 350 with vortec heads are along with the intake specs. Are the same as a carbed 350. If so then no worries, I've built 4 350's with carbs but wanted to make sure the EFI motors do not require any special torque numbers. Its on a 28ft scarab with twin 350's. One of the heads has a leak in it and needs replaced.

EFI makes no difference on head torque, only the materials that make up the head and the gasket. Did you use a Merc gasket? Did you use new head bolts?