554 Head Casting on a Truck engine???
May 10, 2005 | 02:11 PM
#11
Well, the L33 is the high output (310/335), all-aluminum 5.3 available just this year if I recall correctly.
But you said the block is cast iron? I thought I had read that the L33's had LS6 or LS6-style heads, and I don't remember seeing any casting numbers for them.
But you said the block is cast iron? I thought I had read that the L33's had LS6 or LS6-style heads, and I don't remember seeing any casting numbers for them.
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