69 351w 4v
i've put about 700 miles on the torino. it runs good for the first 30 or 45 minutes then it pings like crazy during acceleration. i'm mixing racing fuel with 93 octane pump gas and using lead substitute.
at idle the timing is 6 btdc which is what the sticker on the valve cover calls for. i'm thinking i should retard the timing but a mechanic buddy is saying i need to re-jet the carb. i replaced the original with an edelbrock 1406 (other than that everything appears to be original and unmolested).
according to everything i've read this engine has a c/r of 10.7 to 1. that isn't going to work on pump gas and mixing the 114 octane isn't making much of a difference so far.
the car only has 81k. as much as it goes against my nature it seems like i should keep this original.
so, how do i lower my compression ratio without going too deep into the engine?