Your correct, the blue gasket is the exhaust manifold gasket. The other gasket / seal is more than likely the front crankshaft harmonic balancer seal. As far as the gas tank, it's a good bet it will need to be cleaned. You can save yourself a load of heart ache and remove it. Once you have it out you can better make a decision on cleaning or replacing. ... I know like others here we would love to see some pictures of your truck once you can post them. Good luck grin


~ Craig
1958 Viking 4400
"The Book of Thor"
Read the story in the DITY
1960 Chevrolet C10
"A Family Heirloom"
Follow the story in the DITY Gallery
'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting)

If you don't like driving yourTruck, you won't drive yourTruck..| Living life in the SLOW lane