When I do my conversion on my 82 that has a Vortec with the Saginaw pump I will let you know what happened. I will ad a cooler to the return line to give some more capacity. I am also doing this to a 92 truck with Toy pump. I will enlarge the restrictor as mentioned in Hydro Assist On the Cheap. I will ad a cooler, but wondering if I can ad a secondary reservoir instead of brazing on an extension to the Toy Res.