don't worry, you are not "spamming" at all ! it is always very interesting to follow a work in progress. 1978 cars are unexpected and great idea, I hope to discover the car finished, and maybe more if you want !
I've done other researches, I think you're right, the video and photos I found are from the pre-season 1984 version, which was square, as the 183t dashboard was in 1983