I just have a quick question iam installing mechanical FPG and i just want to know if i have do do both snubber valve and neddle valve  or just one be good enough ? thank you 

I think just one would do the job. I have the needle valve on mine. You don't need to open the needle valve very much. Maybe 1/4 to 1/2 a turn at most.  I've never used the snubber 

I don't have one either just the needle valve. I am however going to put one on when this summer when I rebuild or replace my valve. That being said the needle valve alone has worked fine for many years I am just going for the added protection while I am in there. 

 

I'd use both if you have them both, or if just one I'd go with needle valve, mine is barely cracked open.

While it may be unnecessary, I have both, I also used commercial air brake line from the snubber to the gauge after mopar1973mans recommendation. 

I just installed a marshal oil filled gauge on my 2001 yesterday I used glowshift barb fitting and a 72" steel braided 3an hose works great, oil filled gauges don't need a snubbed.

Stock intank lift pump does 12 psi 7 at cruz and 0 to 2 psi at full throttle...lol .

Fass 95g next weekend.