63 dart/63 kmember/64-66 A 273 mts (with the tab welded on one for a 360). Which black insulators should I use? the thin ones listed for a 64 V8 or the thick ones for the 63 slant 6. racing app & I do have the one mentioned further down, the one for the drivers side with the interlocking tabs which a little bit thinner slightly than the 63 thick ones. Thank you for your time/input
