My Blower Combo is 10.25-1 I'm running the Blower 8% under and Im getting between 8.5and 9.5 lbs. of boost I have a Comp Magnum 292 605 Cam , I discovered The Magnums use the Old VDM lobes that allow up to .015 over or under the .022 Lash I have Mine at .010 Cold , with the Eld Aluminum heads Im running either 100LL or 93 Pump and Torco Accelerator , 3923 Autolite Plugs 33 degrees Total timing , no sign of detonation Im using Twin 660s that I tweaked over the years with the Ford progressive carb linkage ( this is a 100% PA Street Legal Car ) ok all that said Im thinking of Trying E85 since its now readily available in my area , all the tech out there on E85 Carbs are on Single Carb setups , Ive done the research and I believe I can use the 660s with some minor mods , I converted the rear bowels to their own feed I don't trust the transfer tubes to flow the addition 30% of fuel , Everything Ive researched says E85 and Roots Blowers are a match made in heaven , well Ill let you know , but in the meantime I welcome any Insite on E85 from my fellow FE Guys

My 68 ran a best of 10.63 @ 126.95 this year with a best 60ft of a 1.46 C-6  with low gear set and 3.66 Rear Gears Tight 10 inch street Converter leaving at 2300 Car weighs 3450 , presently

The reason as to why the top of the expander IS Oil Control , since the second is MOSTLY a scraper, The easier to get the oil into the oil grove the better , the gap is typically very tight on the expander rings not being able to handle the oil will unload the seal on the second and possibly the top as well , this was first tried on Blown Alcohol Combos , but seems to work on NA as well

Plugs should of been First , given the Ifo provided , I also disagree with All wires will have the Plasma display , if the do they are leaking energy , and yes electricity is lazy easiest path to ground , and speaking of GROUNDS , to many combos with poor Engine Grounding , when in doubt add another !

How much end [lay does the dist have ? and what is the depth reading on the gear ( cant blow pic up enough to read you caliper clearly ) and how about a pic of the bottom of the gear .

Standard Ign DG18

good catch,. Rory I shared a diagram without double checking

What Brent said !!! the gear distance is CRITICAL on Fords you really only have .010-.015 to play with , you dont want it to ram into the block when tightened or constantly be pulled down when its set to short on distance , NEVER Assume