I used www.transdirect.com.au for some parts from Melb to the Gold coast
Cheaper than Smartsend, actually cheaper than anyone else I could find, and they have a warranty included in the price.
Check them out.
definately a bottle heater! Once the pressure gets below about 800psi the shot is really affected. Purge not so much.
Definately a full throttle switch!
definately only get one with either a dual solonoid(blitz dsbc) or a stepper motor(hksevc).
If you are using an external wastegate it doesnt matter as much as with little internal gates.
i had a solid conversion kit and it included the same springs with only one side of retainers.
You should stay with the hydraulic lifters and save the hassle.