A 350 will not fit without moving the steering box if you have the original frame/suspension on these trucks.
Motor mounts will need to be changed as the 6 and the V-8 are different.
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Do you mean you have a 1978 230 six cylinder???
235 engines were made up to 1962 (here in the U.S.)


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!