[ponyakr]

Gonna buy some new plugs for my Super Low Budget 455 bracket engine. Has 6x-8 heads.

After I had a Champion plug come apart at a race, I always used Accel plugs, in all our race cars. Never had another plug problem. But, Accel plugs are now above my budget. And besides that, I don't know if they are still good quality or not.

It has Autolite #26 plugs in it now.

Have been reading a lot of online plug info. Seems that I don't need resistor plugs, since I won't have a radio or any electronic gizmos that would be affected by non-resistor plugs.

Lots of guys like NGK plugs. And, the non-resistor plugs I'm considering are only a couple of bucks each.

I'm considering the R5673 or R5674 series plugs. Looks like the R5674's are projected tips, & the R5673's are not.

(1) Is there some reason why I should use projected tip plugs, for my app ?

(2) Advantages & disadvantages of each type.

Considering a #6 or #7 heat range.

(1) What would likely be the best NGK heat range, for my app ?

(2) Which heat range would be less likely to foul, with lots of in-shop starting & tuning, or would it make a difference ?

Any other $2 non-resistor plugs out there that are better than these NGK's ?

Not interested in any fancy, high dollar plugs. But, help with these specific questions would be appreciated.

PS: Please don't tell me to do a search. Almost every topic here has been discussed MANY times. We all like current info & fresh discussions, REGARDLESS of how many times the subject has been covered before.