I have a 1991 VG commodore Ute tow ball edition, it’s got 300k on the clock, was wondering if it was worth getting the following : 1. High ratio rockers. 2. Bored out throttle body. 3. Memcal chip.

Answer- 1. Unless you're planning on a cam setup, then our higher ratio rockers certainly work quite well. Answer- 2. This is another good modification. Answer-3 . This would genuinely work quite well given you have a Series II VN (VG)