I e-mailed an msd tech and he recommended the following for my bbc, digital 6plus #6520, coil #8207, and dist #8562. Do i need the digital 6 plus or will a 6al work. 6al is 100.00 cheaper. Could not find part #8562 for dist. Was wondering is this vacum or mech advance? And which would work best? I am still looking for an oil pan 10 or 14 qt. Any input is appreicated. Thanks alot, first jet to rebuild.