The GMC 248 engine was produced from 1941 through 1954. The GMC 270 and GMC 302 engines through 1962 will interchange and fit your truck and should bolt up to your Hydramatic (with the proper flywheel) if you wish to retain it.

The 270 or 302 will provide more power and can be modified to produce substantial torque and horsepower. The 248 and 270 cylinder heads will interchange; the 302 head requires a 302 piston.

God's Peace to you.

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Inliner #1450