There is probably 50+ cars from 71-74 that it could have come from... Is is a Seattle local car or? Just a little info could go a long way. It's not the long lost Inch pincher engine thats for sure. Not a DDS one either, it has all the correct early race parts but nothing that says it's from a specific "sponsored" car. The pulley looks like a early Clauds Buggies pulley but the pic is too small to really see. Same with the detail on the flywheel, yes it's been lightened but I can't see if it's a 6v or 12v.. Many early cars ran porche boxes and used the 6v flywheels. Itm sure looks like a D case, any chance of better pic's?
pull a valve cover as there may be a head porters stamp... Fumio?
If it was a Wa State engine I would think there would be more early Renton Berg parts on it...
Give us some info to go on.