US Gear does not mention oil change after break-in but other manufacturers and other sources say to change it after 500 miles. I guess the safest thing to do is to change it now with additive and then do it again at 500 miles. Also, can this noise be normal for a new gear during break-in? I had it out for a short drive a couple days ago and it was quiet. I'm taking it out today for a slightly longer run so we'll see what happens.
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Ray Klemm calibrated Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear
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Last edited by jhein; 07-19-2021 at 12:27 PM.
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