Recently, I have noticed a small leak on the rear head gasket of my 06 LTZ, which has the 3.9 V6. My question is, has anybody performed a top end rebuild on tis engine and what are things to watch out for? also, what are some good sites to get a complete gasket kit WITH head bolts included, because i can only find the gaskets, no bolts. any info would be appreciated, thanks!!