Just a few quick pics of my ls1 airlid mod. I had to cut a small notch in the upper frame rail. I''ll have pics of that added when i move my rad.
Hood was junk, just wanted to make it work on that day. Sheet metal was to thin, and was bending.
I don't need to move the rad much, and if you had a cowl hood you wouldn't need to clearance much if at all.
You can see where i tried to make it seal using some nylon rope and foam gasket stuff cause the sheet metal was bending, bad planning on my part. Thicker sheet metal will fix the problem.
Shows how far the run is into the tb. around 6 inches from back the lid
Shows how much i need to move the rad to make it clear a stock hood. not much.