Couple of questions about break in lubricant : I just dropped a 250 in-line 6 in my 77 Maverick and had read or heard that you should add some STP to the oil for the 1st 500 to 1000 miles. It is the only old style addative that has zinc in it . Any positive or negative input is appreciated. I also found a 68 Sprint B 289 that i am trying to buy , the guy is holding it while i raise the $ selling my 68 289 C code on e/b , item # 260189607597 , it is white and has a sprung hood , the way i got it. Right now it is 4 lug with a strait 6 in it but the vin and paperwork say it is a 68 289 . Check it out and let me know what ya'll think , both about the lube with zink and about the listing .... what do you think it will bring? I need 2,500.00 for the 68 Sprint B Coupe which i have a balanced and blue printed roller 289 to drop into. Wish me luck ! ( holding breath and crossing fingers) Bill