like it says ,im going for a retune soon and i want too bump up to 60s ,i have 42s ill do trade or pay outright.i guess i can go larger if ness,ill just turn down idc.o i also will be needing plugs to wire in also ,either or both.thanks pm me or post .

 

bump ,still loking

 

morning bump..

 

I wouldnt go larger then 60's if you dont need to. 60's are actually 72's at GM fuel pressure.

 

please elaborate cus i just had too order a set of 72 holleys.god i hope i didnt just waste 640 dollars,i cant take them back.will these end up working on my setup?give me some good news for a change .i know ill have to fet clips 2 make them work o my ls1 tho.

 

What fuel pressure does Holley rate them at? 43.5(3bar) or 58(4bar GM Press.)

 

Are you selling your #42s?

 

not sure to be honest ,this is the first ive bought and i hope i havent screwed up and wasted thiis much.it just says holley 72 lb ,universal ,low impedence .is that what youre talking about?

 

I think we need the high impedence injectors if you don't have a seperate module to run the injectors.

 

i wonder if youre right maybe someone will chime in and let me know.the place i ordered from couldnt get any others in stock any where ,i hope this can workout for me .