hey fellas ive gotta 90Sc its my 2nd one and im aware of how tight they r to work on and a total pain to replace head gaskets.i just replaced my head gasket and drove it 3 days and the oilpump quit and seized the engine on my way to work..i have a spare engine that i can rebuild and then just install it but im really afraid because ive heard that supercoupe3.8's have weak bottom ends ans that the cranks will start rattling kinda ez... so im wondering will i be better off to just instal a 5.0 V8 andjust be done..