Just wantd to update my chimney status for those of you that offered the great advise! Well firstly, the pipe didn't make it thru the summer
It rotted and had soft spots on the whole length of it. The 90 degree angle at the bottom totally rotted out. Guess I was a tad optomistic about its survival after my efforts to preserve it lol. So, no stove pipe chimney this year
Good news! I rebuilt the top couple layers on my block chimney and its looking a lot healthier. I didn't get to coat it yet like Berlin and Fred suggested, but its usable at any rate. I shined a light down thru the top and used a mirror to look up from the bottom and I don't see any obstructions. I cleaned out all the debris where the flue 90 degrees into the basement. All looks good!! I have the stove pipe in the basement from the furnace to the flue all put back together. My 6 inch stove pipe goes into an 8 inch square flue. I sealed around the pipe with tightly packed fiberglass insulation. I didn't know what else to use, and I know that stuff doesn't burn very good lol. Is there something better I can do there??
I got the mano in place and calibrated and much to my amazement the block chimney is averaging a draft of .015 with just a 100 watt bulb in the furnace
I'm looking forward to lighting a fire
I'm already thinking my draft will be more reliable and consistant