I would suggest resurfacing the flywheel,do the disc and putting in the 261.If the GMC engine were a 270,I would use it.The 248`s are good engines but the fabrication is a weigh-in of the factors involved.


There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!