I'm moving back to a cooler/thermos mash tun and want to add a couple pumps to my setup. With my brew-club, not everyone is thrilled with their march pumps and so I'm looking for options, in particular any centrifugal pump that is low budget, can handle high temps, and ideally where I can supply the motor (drill or whatever, 1/2 hp).
Is there any reason to not use oil pumps meant for engines? Small block Chevy oil pumps are a starting point because they are cast iron and under $20 (re: Melling M55). I get that I'd have to put some effort in on the fittings and a mount, but it seems like cast iron is cast iron. I've not found info like 'does it has lead' or other toxic elements that I should be concerned about. They're made for 1k+ rpm, I'm guessing once primed they should be more than sufficient.
I'm asking for a sanity check - anyone have a take on using engine parts for brew setups?