Cheap & Nasty, that's how I had to make the adapter when I did it to put a 2245 Holley on My SuperSix intake. I decided to slot the base plate in the 2245 to match the smaller BBD at the throttle end to keep the throttle & kickdown stuff where it belonged, and let the inside end hang over with all-thread studs in the right spot, shifted a bit forward. Only problem is the base material needed filler there, iron & aluminum. The Al intake was 1.5 10ths quicker, for whatever reason, just was.
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