[bmpmdf]

Do you know which cylinder heads you have? All of the 1970 350 engine had a #11 head casting number. These can be made to work well on a 350. They were rated 8.8 to 1 compression. Your block code shouyld be a YU or WU. That is found under the passenger side head on the front of the block. It is stamped in. There will be some other numbers above it. A combo that works good with these engines is the 4 tube style headers, (flowtechs i think have the cheapest that will work) avoid the three tube headers!!! You might as well stay with the manifolds before the 3 tubes! PY offers a nice exhuast system I would go with 2 1/2" dia back to a good muffler like the dynomax or Magnaflow (my favorite after testing) and then your choice of 2 1/4" tailpipes or 2 1/2". You won't notice a difference between the two sizes on the tailpipes. Intake wise go with a Edelbrock performer or if you want to look stock, any of the 67-72 factory 4 bbl. intakes (just make sure it is pre e.g.r.). If you don't want to change valve springs, the Melling 068 replacement cam (melling SPC-7) works great.(appox. $100) Avoid the crane "blueprint" junk. Not the same cam profile at all. Advance the cam 2 degrees. Set your ignition timing around 12-14 initail. Your total timing needs to come in alot earlier than stock. If you don't have Jim Hands book, you need it. He shows the right things to do. This should help liven that thing up.