Swap or not

After spending the last few months doing a major remodel on a rental unit I have I can get back on my cars the first of the new year. 69 Valiant and 74 Scamp The 69 will be on the market and the Scamp staying with me for a long time to come and will be passed onto my son after that

69 Valiant now has a 400 big block - 727 - Dana 60 - HDK tubular K frame-Suspension - needs some tweaking yet

74 Scamp with 69 Valiant front clip and 71 Dart rear bumper - 318 (tired) - A/C - 833OD - 8 1/4 single track

I have a fresh build LA 360 - 8 1/4 3:55 sure grip - Hotchkis leaf springs I'm putting in the Scamp and I'm considring taking the HDK out of the 69 and putting it in the Scamp and the stock stuff w/manual steering in the 69.Yes I know what it would take to do this

Opinions - be nice