I've used some of the resources that have been suggested here and I feel I now have a reasonable working knowledge of how the four link works and what adjustments do. The suspension in the Arrow doesn't have a lot of travel and is pretty stiff. Perhaps it's the nature of the beast given it's a full Alston chassis originally built in 1987. It has the Mustang II front suspension set up and the front shocks are pretty short and they are single adjustable. The rears are a bit longer and are double adjustable. I haven't touched the rears as the previous owner told me there was no need to change them. The best 60' time I've had with this car is a 1.27. Right now it's in the 1.32/33 range. Not a huge difference but it just feels 'soft' on the hit when the transbrake releases. Hopefully I can get some videos this Sunday and be able to see what it's actually doing. The videos I have are not very useful as they were taken from the stands so you can't see a lot of detail.