Not really a great place to post if you want responses. I would suggest you begin a new thread. To answer your question, if you are seriously going to use 4 heatercores and all the other stuff you list, and therefor the numerous Y splitters, bends, etc. your best bet would be something with a very large pressure capability. Something like an Iwaki MD-20R, or MD-30R. Or you could go with the 2 smaller pumps in series, such as 2 of the afor mentioned Johnsons. Regardless it won't be cheap.
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...i hurt...
do me a favor, disconect me...
they can re-work me
but i'll never be top of the line again
...i'd rather be nothing...
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