Have just put a sc14 on an A15 in my Morris Minor and found that the main problem was too much boost. I did have a 135mm pulley on the crankshaft which was putting out 11psi, now I am down to to 115mm pulley which seems better but still have to retard the timming as it was still pinging at full accetoration. May try a smaller pulley in the near future, I hear 4-6 pounds boost is about best.