Originally posted by thesals
1. yes 99% of the time this is true...
2. yes.. any exhaust tech will tell you that stock exhaust manifolds dont flow half as well as headers, you'll get better performance with headers.
3 yes HEI is much better than points for any application, points have to be adjusted and changed every so often, the HEI will put out a cleaner spark and have less maintance.
4. PVC, yes it is important, i've seen motors hardly run at all because they dont have a PVC, i've also seen oil pressure issues because of not having one.
5. best way to break in a motor is first run it for 20 minutes at about 1500-1800 rpms for the intial break in, use standard oil not synthetic and keep it stationary without a load, the engine will tend to run a little hot one break in so make sure your cooling system is up to snuff, dont use an old radiator thats all plugged up, at least get it rodded out. change the oil, if you plan on using synthetic you can now start using it. now drive the motor how you plan on driving it all the time, just dont be slamming it and putting huge shocks on it. change the oil after 500 miles.. good to go.
6. cant tell what car an intake manifold came off of, but you can find out what motor it came off of with the casting numbers.
I agree with a majority of this but I would run the r.p.m.'s a little above 2,000 and vary the r.p.m.'s up and down a little to change the (oil splash).I would not add any synthetic oil until you have over 3,000 miles on the engine or your rings will never (seat).Maybe even more if you have moly rings in it.