So the rebuilt type 4 went back in the van last week. Set timing static at 7.5 btdc. Bit reluctant to start and coughed a bit, Had to advance timing some more to smooth it out and get it running at 2-3k to bed in cam. 20min cam bed in run ok decent oil pressure & no leaks. Did oil/filter & valve clearences when cold. Reset timing correctly at 28-30btdc at 3500rpm. Vac pipe off distributor & plugged. Rejetted carbs as recommendations by Wayoutwestie for 2.0. Went for a few short runs and it idles rough seems reluctant to rev & pick up. Checked for possible vac leak but all ok. I was careful to make sure the timing marks were lined up when i was building the engine but fear the cam timing is out. Having to over advance the ignition timing to get it to run smoother is the worrying issue.