"The Distributor Doctor" is the only source I know of for bushes and advance springs.
The bushes should be oilite; contrary to popular advice it can be reamed but do so with a sharp /new reamer and use it sparingly. Pre-soak in engine oil and don't forget to drill the hole for the oiler after fitting...
John, I shudder to think how many cranks that advice may have taken out. One thing to remember though is that 'proper' petrol used to let you know it was over-advanced by audible pinking; in fact I used to set my ignition by driving up Slapton Ley and advancing till pinking occurred, then back off a bit. Nowadays it is possible to run with massive over-advance with no 'hints' for the unwary.
The bushes should be oilite; contrary to popular advice it can be reamed but do so with a sharp /new reamer and use it sparingly. Pre-soak in engine oil and don't forget to drill the hole for the oiler after fitting...
John, I shudder to think how many cranks that advice may have taken out. One thing to remember though is that 'proper' petrol used to let you know it was over-advanced by audible pinking; in fact I used to set my ignition by driving up Slapton Ley and advancing till pinking occurred, then back off a bit. Nowadays it is possible to run with massive over-advance with no 'hints' for the unwary.