Inliners International Forums General Discussion Engines SU carbureters for GMC

Does anyone have any experience using these carbs on a 270 or 302 GMC? I vaguely remember seeing some photos of an installation several years back, but I can't seem to find the reference. Any info or comments will be appreciated.

Ron, we posted some photos from the last Inliners East picnic in 2001, of a nice SU setup on a 235, belonging to a guy from Baltimore. I talked to the owner and heard the car run, it started instantly and idled well. He said it had good power and response and wasn't too tricky to get dialed in. He used carbs from the 4.2 Jag L6. Intake manifold was home-built from billet, separate stubs connected by a balance tube, and the whole package looked great.

I used to mess around with SU carbs quite a bit. They are simple and work well if you take the time to make a proper initial set up.The 2 inch carbs from a Jag are kinda expensive new or used.The 1-3/4 inch models were used as an upgrade on MG's and I believe on Healy 6's,can be easier to get for reasonable money.
Another sidedraft option is S&S carbs as used on Harleys.You can pick them up at swap meets for 50 bucks each.

I talked to the same guy Jack mentioned. I can confirm that the car from Baltimore started and ran like a watch! The owner told me that another source for those carbs, or very close copies of them, was from old Datsun sporty cars. The Japanese apparently had an agreement with SU to produce that carb for Datsun 240Z/260Z series cars. You might want to check 'em out.