GM Flat Tappet Break In Frustration

[1972BlueC20]

Hey Guys!

Well I'm a little annoyed because as many of you know I recently had a GM crate engine installed in my truck. I'm learning more and more everyday about all things mechanical and about our trucks in general.....but I wasn't told at the time and I didn't know that I needed to use a higher zinc oil for the flat tappet break-in period.

What ticks me off even more is the break-in instructions that come with the crate engine from GM say NOTHING at all about using any type of break in oil or additives....actually it's states to just use normal 10w30 conventional oil then they say you can switch over to a full synthetic oil if you'd like after sufficient mileage accumulation.

The mechanic that did my engine swap (which now has shown to not be the most knowledgeable person) also said nothing about using a zinc additive or special oil.

I spent a lot of money on this engine with parts and labor and I always like to do things the right way, it's really my fault since I should of known so I really blame myself....I just hope I didn't damage anything....the engine runs great and doesn't make any abnormal noises. It's got lots of power....I've been taking it easy on it during the low mileage period. Only getting on it here and there but nothing too crazy. The mechanic shop did follow the break-in procedures as suggested by GM (even though GM didn't mention using break in oil or any additive) and they did change the oil after so many hours of initial break in and since then I've been running the same valvoline 10-30 conventional.

I've only put just under 700-1000 miles on my new engine total.

Has the damage already been done?

I was thinking of changing the oil now and using an additive or a better oil.....it's too early to use a full synthetic with higher zinc correct?

Any advice is greatly appreciated!