Quote: If you really like this cam, I suggest you get a Racer Brown SSH 44. The MP 509 cam was a near copy or the SSH 44. Before there was Direct Connection or the later Mopar Performance the Mopar race bulletins recommended Racer Brown cams and many of the Purple shafts were in fact copies of Racer Brown designs. The advantage of getting the "real" 509 cam from Jim Dowell at Racer Brown is that he will custom tailor it to your combination. He will give you the LSA best suited to your car and also grind in the best advance for you. I've dealt with Jim in the past and have always gotten good service and sound advice.
The SSH-44 and its little brother the SSH-25 are both great cams.
Cam ADV, DUR-----lift-----.050 Dur
SSH-25 ---286------.485-----236
SSH-44----292------.510-----243
MP-509----292------.509-----248
All of these Old school cams are great. Todays modern cams have nothing on them except a little extra lift.
Example: The 35 year old MP 509 248* duration cam has the following intake valve timing at a 104* ITC. Followed by a MODERN day cam from HUGHES with a 250* duration.
MP 509 Intake. open @ 20* BTDC, close @ 48* ABDC
Hughes, 5056---open @ 20* BTDC, close @ 50* ABDC
35 years later and we have nearly the Same exact timing events with a similer size modern cam,- the extra 2* of the 5056 250* duration @ .050
IMO, The tricky part of the cam Design was figured out YEARS ago. The above shows that IMO
Example; If you have 248* of intaske duration to play with, where do you put the valve events at BTDC and ABDC??
Open @ TDC, close @ 68* ABDC, OR
open @ 10* BTDC, close @ 58* ABDC, OR
open @ 20* BTDC, close @ 48* ABDC, OR
open @ 30* BTDC, close @ 38* ABDC.
And after 35 Plus years of Study, the answer is,??
. mike 
