i need some spark plugs everyone has said something deffrent.AC Delco R42LTS gapped at 0.040" ( 1 step colder, for higer compression use) would these be good someone said ac delco gaped .60 i don't know for sure but the motor is going in thursday an i would like to have the plugs in by then.also anyone know where i can get a dirgram for all these vacum lines? thanks alot

 

i ported the heads an intake 52 mm throttle body ,6al msd,elderboc headers ,flowmaster, ramair,alumin drivshaft

 

If your block is still stock just go with NGK TR55 gapped at .050. I used those with my hotcam setup and they were great.

 

I used the LT4 cam and 1.6 rockers and I am using the Bosch Platinum 4 plugs with Tayloe wires. No problem here.

 

Thats what I'm using now with the HC kit and their working great