Upgrade for '70 Swinger 340 rear

My thanks to all. I currently have a set of 215/70R14s for shop tires. I can't find any 14" performance tires. I'm thinking of getting a set of 4" SBP 15" ralleys from summit. Maybe some 215/70 15S? I think 3.55's will do well for the street, and occasional trip to Rob's. Should I upgrade the yokes on my 741, or are they enough? A little rake is ok. Thanks for the kind offer, Rob, but I think it's my turn to run down the I-95 to your house. I'll PM you with pictures of what I have so far.

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