I finally got a good, running 6.2L with low miles for my 1987 3/4t Suburban the other day. I'm going to swap out the 6.2L that the previous owner killed with a lack of crankcase oil. I'm going to change out the fuel filter, water separator, new air filter and (of course) change the oil & filter when I install the new engine. Is there anything else I might want to consider doing before I fire it up in the 'Burban? The running 6.2L is used with approximately 60-80k miles on it. Prior to being installed in the donor vehicle, the unit came from GM as a replacement engine. Thanks.