[QUOTE=brenx]what spec/part no plug are you running now? Try going 1 step hotter and leaning your idle mixtures off a tad. You'll be fouling them on start up and idle. I'd also change to an NGK V groove plug.
damn right, fouls at startup & idle! Running stock NGK BP5FS's at present (Holley 650 dp, AFD heads), not bad if I keep idle above 2000rpm, hotter plug could be the go, but would like to try NGK Iridiums UR51X's. Supercheap wants $28 each for them!, found some via Ebay (US) @ US$47 for 8, ok if they are better?