IN2FORD

I had planned on running B303, GT40 heads, 1.7 Cobra roller rockers, and Cobra intake. I am now questioning the 1.7 rollers after reading some things. Do I really need the 1.7? Would the 1.6's be enough and run better?? What spring pressure do I need with the B303? I checked my factory springs and they are at 70lbs. Give me your thoughts please.....

Novipowered5.0

Factory springs will not be adequate.
You will be fine with 1.6 rockers with the B cam.

Joel5.0

Which are ???? ...... You need to upgrade the valve springs anyway, and a little added lift will help it breath a little more.

IN2FORD

So having the 1.7's will not hurt performance on my setup??

Also what springs would you go with??

militarymustang88gt

crane or comp. get good ones and spend the money that way if you want to go to a bigger cam later on it will sufice for it.

Joel5.0

Hurt?.... no.... gain?..... most likely, and you could do better than a B-303. If you plan to go with the B-303, E, X, F, TFS Stg 1 cams.... you could use Trickflow's TFS-2500100 kit or the FRPP combo of M-6513-A50 springs + M-6514-A50 retainers and M-6518-B351 locks, or one of the upgrade kits from Crane..... in my X-303 setup I have the FRPP parts.

jtmustang

hey there i have a brand new set of tghe trickflow 1.47 single springs that came off my twisted wedges i removed and replaced with andersons hi rev springs for a bigger cam i am trying to sell them , so u would have to get the locks and retainers but no big deal the machine shop could take care of that ill sell them for 40 bucks shipped via paypal. let me know jason pm me

IN2FORD

So would those springs work on my GT40's and could I use my retainers and locks?