I am looking for a shorty spark plug for my vega but i dont think any company makes one shorter than the accel ones. but i dont know how to tell the heat ranges. I was checking through listings and the only one i found made for the ls1/ls6 cars were the P526S shorty plugs. but they are $16.69 each!!!

i plan on running nitrous later on down the road 100-150 shot so i want to make sure i have the coldest range plug they have(since im sure its either all or nothing with these plugs)

Also if you are wondering, header clearances are TIGHT so thats why i have to run shorty plugs. unless you guys have other suggestions.