Hi guys, just pulled the NGK's from my 305E with a 600 cfm 4 barrel, Pertronix hei, and dual exhaust. 10 degrees initial timing and gap at .040-.043. Not bad. Couple of them are shaded a little. All are burning a tad bit of oil from the valve guides. But I am impressed. Runs good. Put some AC delcos in and will test those. So far I have noticed a little more low end response. Overall no feel of better acceleration. Gapped at .055. They have a cross over for NGK's so I may end up eventually going to their version as I have never had one bit off issues with them. Plug numbered 1 - 6 from left to right.
