Wouldn't the timing settings in the book work fine with LRP? I've run a few old cars on it without having to retime them, admittedly it's more expensive than unleaded and if you've gone to the expense of an unleaded head conversion then feel free to ignore me
Standard settings should be fine. I run my 2.8 Capri on unleaded with additive (didn't seem to like LRP). Did sometimes experience knocking at full load, so now trying additive with octane boost. Haven't done enough miles to give definite answer, but no problem so far.
