Here's something to consider:
I did a /6 to a 318 swap because I had a teen in my '72 when I was 18 yrs old. And besides, a basket case 318 was in the trunk of the '72 duster that my wife got me for Christmas in 2010.
.040 over, K.B flat top pistons, Comp Cam 20-223-3 cam - 268/280 with...