The wits end kit came with a borg warner oil cooled journal bearing turbo. The pulsar gtx3582 is a chinese knock off of the garrett gtx3582, it is ball bearing and watercooled like the garrett turbo. Water cooling won't reduce underhood temps but will help with turbo longevity. I highly recommend getting on the 1fz turbo landcruisers facebook page and reading their pinned post, it is now a word document that answers basically any question you could have regarding turbo charging the 1fz.I’m in the same boat; I’m waiting to hear how the Pulsar GTX3582 comes on boost with our US Spec ECM and AFRs. As you mentioned, there’s little info regarding the Pulsar turbo so I’m wondering how it compares to the Garrett Turbo that was supplied in the Wits End kit. Two things for certain, the Pulsar is internally gated versus the Garrett requires a separate wastegate (adding cost to the build) and the Pulsar is water cooled VS the Garrett is only oil cooled. Would the additional water cooling help the Pulsar turbo last longer and Possibly help reduce the intake temps/under hood temps? Idk for sure but I’d assume so?
I sent an email to HDAuto asking about a smaller turbo, the GTX3576 along with shipping estimates to New Mexico, but haven’t heard back from them yet.