Yep, you should upgrade your lines.
Most aftermarket fuel sender pickups are made with 3/8" tubing, at least that is the case with the 65/66's. The tubing under the car can also be upgraded to 3/8" with aftemarket sources. Best to specify the 68' style under car tubing as it has better bends and is not located next to the driveshaft (which could be a safety issue.)
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Dennis
65' STANG, 3160 lbs
393W NA, 2.78 Toploader 4 Spd, 9" 3:70 Posi
Pro Comp Heads, Vic Jr. Intake, 750dp, 236/561 Solid Cam, 9.6CR, 1 3/4" Headers, Lakewood, Subframes, Caltracs
<font size=-1>[ This Message was edited by: dennis111 on 9/5/06 6:22pm ]</font>