Wow!!!! You can justify 20 heads?? And thats what you are admitting to. If you really got all your heads together I'm sure that is north of 35. Can you say hoarding?Well, some of those heads are kind of rare. Some are just unusual in the US. The rest are just regular 1.9 heads.
I’ve got two new Swedenheads, one new Kadett GTE 1000 head, about 6 or 7 of the raised port 2.2/2.4 heads, three 1.5 heads, one 1.6 head, and two 1.7 heads. I also have my own personal stash of 4-bearing/10 bolt heads (late-1970, all 1971, early-1972 vintage) which is my preferred go-to performance head core. Sure, the 2.2 and 2.4 heads can be made to flow more, but they really only surpass a well ported 1.9 head at high valve lift....higher than any off the shelf cams in the US. The 1.9 heads are a better choice for street use and many forms of racing when cams with .500” lift or less are used.
The other ‘normal’ 1.9 heads are all heads I will eventually prep to sell. I’ve saved them because it’s not like you can just go to any old junkyard these days and buy cores. With Bill Daley’s shop closed up (and him passing away), there’s really nobody left in the northeast with any used cylinder heads anymore. I was never one to sell used parts but if somebody needs them, where do you get it from?