I started the topic over the weekend but I had to wait for the topic to be approved and then for people to start commenting! My car started making a ticking/knocking sound last week when holding revs through each gear while driving. I took it to my local mechanic who checked it out and gave me a fair idea as to what the problem was, but he wasn't 100% sure and recommended I take it to a Jap tuner for them to check it out which took 2 days as they are a busy workshop. I then started the topic while waiting to hear back from CREATD about my options. And at that point I still hadn't approved the start of the rebuild as I was wanting more information on wether to sell it or rebuild it. MOST people on here were very helpful and informative which is what I was after... Not over ego people just out to compare the size of their 'engines'. As I said earlier, my car is a daily driver so I needed it fixed yesterday. If I had the time/knowledge/space and tools then sure, I would have done it for your supposed 3-4k. But dropping in a RB25 requires a engineers certificate which takes time and more money, plus a new ECU... More money. I figured I already have an engine so why buy another one when I can just rebuild mine. I will be fitting the HKS 2530 or 2540 to it, and I think my 6k budget will be well spent in the outcome. So thanks for your input, good and bad.
And I'll change the topic to 'RB20 to RB23 rebuild' if that makes you happy... Although the topic name was correct for half of the comments... And then when the rebuild is finished, I'll change it again for you all.
Cheers again to the people that have helped.