While I've been on that situation several times .. IMHO con eBay at least, sellers with 100% ( or close to like 99.9% ) positive feedback are far more worried about customer satisfaction .. so they proceed accordingly ..
pumps .? for 1HZ / 1HD family ..? not that I'm aware of ..
Horacio down here made the local ( you know local labor quality ) experiment to try an adapter to run a PSC pump ( like the one I have in Tencha ) on he's 1HZ with no avail .. but I saw the adapter .. the idea was promising...
I had one TJM on front ( 8" 80 series HP reverse cut ) and didn't last .. their warranty was top notch with the replacement .. I honestly don't see a huge advantage on the piston ( TJM ) over the ARB .. if you told me about the electric Harrop .. there is a difference .. altho the Harrop...
The shroud on these ones looks wider .. by far, it's really that much leftover on the lateral of the rad ?
the dorman ford are not great on quality and I've been looking on derale option or doing my own shroud with spal fans ..
Hi boost might affect at that level the injectors ..? ( positive pressure ? )
Since my 1HD-T have more less the same pump .. I never experience that .. ( my hi boost it's not the same as your hi boost tho ! )