I have two fresh Formula B engines, dyno time only.
1. Lotus Twin Cam, all steel internals, fresh build by Bob Adkins. 175 HP, complete and ready to install. $ 14,500
2. Ivey built Kent based Formula B engine. All new custom build, with dyno time only. 170 HP, also ready for install. $12,500
Both of these engines are suitable for FB or could be used in FS. I installed the Kent engine in my FB Eagle for mock up purposes. Going in a different direction.