unfortunately all we've done is break in the cam, 25 minutes of run time at 2K rpm. that's how we ended up with this mustang, the barracuda has been in process for almost 4 years and my son needed a daily driver so we bought this 66 mustang from a non-mechanical friend of his. it's been a lot of fun and my first ford ever, i grew up on 57 and 64 chevy's. put a DUI distributor on 2 weeks ago, an 1101 pony carb 3 months ago, 2" exhaust, new carpeting, all new suspension, 16:1 FR steering box etc. only about 100 hours left to finish the barracuda but this mustang has been more fun and easier.