Posting this engine for sale for a friend that used to run the USAC midget series. This engine is a 166ci 3.66 bore 2.625 stroke. aluminum block that was cast by brayton, 6 bolt mains, dry sump, belt drive external pump, the internals are some high end forgings but i didnt disassemble the engine enough to get a make on the crank or rods, massive dome pistions. the heads are stage 2 but with a smaller port than the typical indycar heads. and if i remember correct a 1.94/1.50 valve due to the smaller bore. shaft mounts, ti retainers, the camshaft is of unknown specs but this engine saw rpm at the 10k mark on the recall. it had a mag installed on the motor now but also has 3 different electronic ignitions modified by brayton engineering and looks to be from the old indy program from my reaserch this engine was used in the former indy lights class and destroked the 166ci limit for usac. i am forgetting TONS of specs and i will be posting pictures this weekend. asking 3500 for the engine. its a remarkable piece, worth alot more than the asking price but this engine is no longer competitive in the class and its been laying around the shop for awhile. any questions feel free to ask and i'll reply as soon as i can