neither the sr or ca are going to be a direct swap. there is a difference between the KA block in the truck and the one in the 240sx. as far as i knew, the engine mounts were in a different location.
also rotarys like lower octane gas. i know its kinda counter intuitive. but with my rx7, it ran best on 87. i would put 100 in and it probably still ran best on 87.
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