Thought on a magnum build

I would just Put a good intake and carburetor and decent set of headers on the Magnum and go with it.

The Summit site says the KB167 fits both Magnum and LA engines and we know that to be untrue, since, as JYH said, the small end of the rods from LA to Magnum are different widths. Also, the Magnum and LA blocks have different deck heights as well. Probably best to call United Engine and Machine and get to the bottom of it.