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I think they are all the same size and length for small blocks? If they fit why not use them? Look closer, I bet it fit's.
No, OP is correct. From my experiences, 318 and 340 are the same. But when I swapped my 318 out of the Barracuda for a 360, only one brace would fit the other was about an inch short IIRC. Can't remember off hand which side is short. The 360 block had the machined boss at the same location as the 318, but the boss was not drilled for a bolt at the 318/340 location. Don't know if this is true with all 360's or not (Mine is a '74 casting).
Scott B.
"I'm a self-made man... I started with nothing, and I still have most of it!"
68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph
69 340 GTS stock 14.18@ 95.60 mph
01 5.9L Ram 1500 Quad Cab 4x4
01 3.5L 300M 16.23@ 86.97 mph
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