[HotRoddin]

Originally posted by moponys
I'm getting my 331 stroker back in about 4 days....

How long does it take to break it in and would it be safe putting it on a dyno after about 300 miles to get it tuned?

I know I should not drive for long distances under load, such as on the freeway. Should I not get on it until 1000 miles are on it?

Thanks

http://www.mototuneusa.com/break_in_secrets.htm

Do yourself a favor and read this top to bottom. In my opinion as far as engine building goes this my be the most important thing you ever read. I totally agree with it. The engines i've built that were run hard right from the get go were always the ones that sealed the best and lasted the longest. I don't think its a good idea to run the RPM's way up or let the engine overheat or run the engine at a constant speed for long periods, but i do believe what this guy is saying, because i've experienced the same thing.