A word of advice concerning DGV's. They are not all that great in a TR6 application. They are not adjustable, only by rejetting. What you get when you buy a new set is a generic jet set. Also, the extra run on the intake takes something out of the efficiency. You lose something on initial acceleration. My advice is get your Strombergs rebuilt professionally. Cheaper, and better suited to the TR. Gary Martin or Joe Curto will do great work..
Dr. Bill