From what I have read, there are a few options out there. I find it a bit difficult to get a direct answer on what to buy that isn't a 2k ecu. Hoping to find somebody selling an old Haltech with or without a harness.

 

Doesnt have all the features Haltech has but if you could give Romraider a go, its free so it cant hurt.

 

Are you doing auto trans or manual? If it's manual there's definitely cheaper options, when I built my Toyota Crown I did $2k Haltech 2500 because it's the easiest way to keep the auto trans. But if you're manual AEM and Link Engine Management should have way cheaper options to just run the engine