Yeah I searched. So far all I know is that the LT4 port is .1" higher than the LT1. What I dont know is if the bolt holes line up, if the floor location is the same, or if the gasket is the same. I have an LT1 superram base that I'm going to get extrude hone ported soon, and I was considering upgrading to AFR 195 or 210's from my LE3's for more flow on the exhaust port and more room to port.

 

Need to work on those search skills. This is at least the third thread on this topic this week.

Try searching for "intake" and "LT4" in LT1 tech.