4.3 V6 Chevrolet Mercruiser Multi Port Fuel Injection

[Rickdees]

One bump in road after another, I got the new style of Feel Pro intake gasket. After much reading Victor Reinz gaskets are suposively used in GM engines and they are much llike the old Fail Pro old style with a different material and a metal shim in the bolting area to help prevent over torqing.
My new bump is the stock hard fuel lines, the feed OD is .318 and the return is .256 while the fuel rail is 3/8 (.375) and the return is 5/16 (.312)
I do have Russel quick connects and 3/8 red horse braided line which fit the intake but the trucks line the shoulder is further down about 1/4".
The feed line fuel pressure will have about 90 to 100 psi.
Any suggestions are more than welcome.