New project in the shop

A friend of mine in California found a 68 Dart for me. I had the car shipped to me in Wisconsin and started to rework it the way I would like it. So far I removed the 7 1/4 rearend and narrowed a 8 3/4, installed Moser axels, a posi unit and 3.23 gears and moved the rear springs in. Then I installed a disc brake set up on the front. Now I have to plumb the brake lines and continue on the next modification. I'm seriously thinking of installing a big cubic inch small block. I have always been a big block guy. I hope if I do the small block that I will be happy with it. I talked with a couple of small block guys, I was impressed to say the least. Any input would be welcomed.