I just removed my distributor on my truck and was in a rush and FORGOT to mark my rotor for installation of the new distributor. Long story but i wont be installing it till tomorrow or later anyway because i was warrantying this one out for being possibly defective, so my truck is sitting till the part comes in to advance auto parts. Ive done this before and marked the rotor and installed perfectly on my first try, i dont know where my head was when i removed it and forgot to mark the rotor. So other then trial and error putting the new one in, is there a more effective method for reinstalling my new distributor? same AC delco as before