The horse is dead

perfacar said

1.6 rockers will not clear in LA engines, i machined about .100 on pair of heads for another shop. no info from the manufactures , these require clearance to fit, same with older chev heads, just food for thought.

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I would have had to take about 1/8 inch out of the pushrod holes in the heads, towards the exhaust side of the heads. I just put the heads together and wasn't going to redo that. That seemed like an excessive amount. The mancini rockers cleared the hole, but the tips aren't centered over the valve during the sweep. I'm ready to just put some 273 rockers on.