The 360 in my '75 dropped a valve and busted the block. I had a 352 block in storage, used it to rebuild the engine. Stock .040" over 352 rebuild other than a Crane RV Cam 343902 that the 360 already had in it. (Duration 260/272, Lift .501/.533), roller timing set (not retarded) and a Pertronix electronic distributor.

It still uses the Motorcraft 2-barrel carb, currently with 069 jetting.

It is running very lean, any suggestions on jetting? Or do I need a different carb?

Thanks,
Jim

 

It is surging at part throttle?

 

Yes, slight surge.

 

Probably the thing to do would be to open up the idle feed restriction by about .001 and leave the jetting alone.

 

Thanks, I will try that. And I erred earlier, current jetting is 059, not 069.

 

I think that's why I would start on the idle feed. It probably isn't on the jet at all most of the time at part throttle and a thou or two can make all the difference especially with a cam that has a bit more duration.