i have a bad spark knock when i throw a little gas to it..... i recently added msd..( distributer.... coil.... 6a... wires). .... im running ac delco spark plugs (45)... i finaly got my timing to 8*btdc..... i added some octaine buster... and it slowed the knock down a little..... but still there.... i am open to suggestions... thanks a bundel
l98irocz

 

Do you know what your total timing advance is? Maybe you need to recurve your distributor. Also, do you have much carbon build up in the combustion chambers and on the pistons?