Originally Posted by 402GOAT
the L76 intake found on LS3 engines
L76 and LS3 manifolds are slightly different
L76 has a press-in MAP hole and accepts the LS2 MAP sensor but the LS3 has a bolt-down MAP design and does not accept the stock LS2 MAP without some convincing
I run an LS3 manifold and all i did was buy another MAP sensor gasket and 'double up' on my LS2 MAP... crammed it in there and its been fine for over 3000 miles. others have done this with success as well.