found my misfire today 2 plugs where wet with fuel. this car had NGK UR5 spark plugs in it. never used them before i want the best plug for this engine 350 bored 30 over flatops with a stroker kit. 462 lift cam and 2 1/2 inch pipes what plug and heat range do i need . auto zone tells me 43TS is this correct?

Really need to know 3 things to pick the right plugs..

1) what type heads are you using?
2) what is your compression ratio?
3) with duration is your cam?

With out knowing that info, I will say I feel R43TS is too cold of a plug and may foul out on you.

I run 43's in my 10.18:1 355 with a kinda small 272/284* cam.

Again with out knowing your specs, I would say no colder than a R44TS and no hotter than a R45TS.

I run 43's 11.33 250/260 @50