vaccum and boost retard question for SC!

Ny Mustang Guy

Founding Member
Dec 10, 2001
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Queens Nyc
im in the middle of installing my SC.. w/ BOV as a bypass... and Msd 6A w/ the MSD Boost Retard Box (I Had an msd 6a and I bought the SC w. the MSD Retard box that goes along with the 6a..) The BOV tis a Greddy type RS that I can use also as a Bypass valve
NOTE: I HAVE A '90 5.0 in My car..Ported Cobra lower/upper, 65mm TB (for now), 24lb inj(for now) Ported Polished E7 heads (came that way), 70mm MAF, AC delete pulley, smog delete pulley, E Cam, 255lph in tank pump..and engine wise...thats all I can think of right now. Yes I have a 24lb FMU..and It is a Powerdyne 6lb Headunit (that I plan to go 9-10lbs with down the line)

1.It looks to be a vaccum line on the BTM Box... where is a safe spot I can tap to.. or connect it to??
2.I have a GREDDY TYPE RS BOV/BYPASS.. that I am using as a bypass that seems to have a vaccum on it... where is a safe spot i can put that to??
3. Where do I connect my boost gauge.. right now I connected it to the T in the firewall in the spot where the AC Vaccum line used to go.. is that alright??
4. WHAT DO I SET MY BOX TO RETARD AT?.. there is a knob on it that you can start the retard at... and I also have the knob that goes in the car of where to set the retard at... What is a safe setting for 6-7psi?? On the Box (The manual says usually 2 for starting on the box) and the retard switch that goes in my car?

Sorry If i don't explain it right.. really tired from working on the car today.. THANKS!