360 Rebuild for 1974 Swinger

What cam did you buy? 214 224? 443 465? It has a very slight idle , I had one in a 71 360 in a 75 Dart Sport with headers intake (performer) and 4.10 gears and it ran mid 14s and a 14.30 best in Calgary on an average day. There are worse choices. Im sure I had factory 340 springs in mine that I had laying around. If I remember you had a single with a dampner spring , have them checked out at the machine shop.