Sorry guys not a Velle QQQ. Is the 4.3 V6 any good? Does it have aluminum heads, or is it all cast iron? I'm looking at a 93 1500 Silverado with the 4.3L. From my past experience with some of these types (4.0 L Ferd V6) that the head cracked after 85K on the odometer I was wondering if Chevy had the same problems. Opinions?