SAAC Forum

Thanks for the update, greatly appreciated. I was just thinking this past weekend when I was checking on some of my other orders that I should give Craig a call or shoot him an email to see where things are at. I just sent him an email earlier to check the status of my order.

I'm going out on Saturday to see if Ben's Boss sells, if anyone wants to ride along. Leaving around 6:00 a.m. Could meet somewhere along 22 or 78. Tickets are $10 cheaper $20 vs $30) if you purchase online before 11:59 p.m. tomorrow night (Tuesday).
Preview of Ben's Boss - https://www.youtube.com/watch?v=8N4O3XVCyZc&t=4s
If interested, give me a call - 610-five5four-0923.
Dennis

I know there is a difference in the heigth of the seal between GT350 and GT500. Is there a difference in the diameter also and if so is just the air cleaner base different or is thwe air chamber different between the two also? Thanks!

He must have had those wheels stashed away from another project as they weren't the ones that were on the car when he bought it which was only about 3 - 4 months ago and I've been waiting longer than that for mine.

I still have pictures from the Great Gorge convention where we went to Island Dragway and somehow I always ended up matched up with him no matter which line I chose. Definetley a character in the best sense.

Looks like they don't know how put the side stripe on correctly.

Found this write-up from the Boss Registry. Goes back a ways but provides some interesting information. The S9MS 5560A that is on Gary's spring matches what is shown on the chart for the Shelbys. Interesting that the spring rate is lower on the Shelby yet the load rate is higher than that of the Boss. Shame that free arch is not noted but as was mentioned, they used different parameters back then. If you use the same formula as shown for the Boss spring, the Shelby's 750/135 would mean a free arch of approximately 5.5 inches which is still short of the numbers Bob came up with but definitely better than the 3.62 for the Boss. I am going to try and enlarge the engineering drawing at work on Monday and still have it somewhat readable. We'll see what happens.

https://www.boss302.com/spring.php

So circling back around to the OP's question, can anyone provide some specs on the differences between the original Shelby springs and the replacement 42-437 Mustang springs i.e. difference in length of 2nd and 3rd leaf that was mentioned? Is there a difference in the length from the pin forward or the pin rearward on those 2 leafs compared to the Mustang spring? Length of the bottom flan leaf? Bob, your measurements of of 6 1/4 to 6 9/16 would put them in the ballpark of the 6 1/4 spec'd from Virginia and the 6 5/8 spec'd from NPD/Eaton on the 42-437 Improved Handling spring . Most of the vendors with the Improved Handling 42-437 springs quote a rate of 114 lbs. One vendor has quoted the rate on the 42-503 at 152 lbs. I called General about the 42-503 to see what the spring rate was on that spring but person was having computer issue at the time so I didn't get a number from them. I am calling them back later today to get an update. If the 152lb number is correct, that would definetley be a stiffer spring which could have something to do with the lower free arch number.