Stepping back and thinking things through in detail and listing the cost and potential problems and finding the solutions BEFORE you dive into the process may be a lot less fun, but in the long term its sure to cost less and result in a far better finished project! What seems to be over-looked in many engine builds is simply the fact you'll almost always DEEPLY regret jumping into the engine build with both feet and waving your check book as you sink ever deeper into piles of parts receipts and machine shop bills, rather than stepping back with a legal pad, and a calculator and listing in minute detail exactly what you want to accomplish, and taking the time and effort too list and check out in detail what each machine shop procedure costs, why its required and how much each components costs, what your options are and how each component will add too or benefit the completed combo (or in some cases cause you time and grief) There's at least a few hours of very worth while, and quite useful reading in this thread and links that will prevent you wasting time and money, keep in mind the sub links contain a huge wealth of additional info you'll need 035-.039 hole it will provide a bit extra lubrication without causing a problem with your oil pressure, just be aware of that drill size, basically a 1/32"-#72 drill, so use a drill press and take your time those bits are easy to break 035 drill so it sprays oil on the rear of the timing chain gear and chain 474/.510) than your heads and tune will handle.(1)drill the front pass side lifter gallery oil passage plug with a. My guess is that the ZZ4, while a really good cam (used a couple of 'em) for appropriate use, just might be a bit more &. 040 over 305 block) with L98 aluminum heads. My brother needed one and I'm planning to use the other in a 336 (3.75 stroked. I bought two of 'em a few years ago just because they were cheap (for hr cams) at $140 for the pair shipped, off of ebay back when guys were replacing them in Ramjet and HT383 crate motors with stupid thumpy cams. Haven't used one myself yet, but everything I've read about it (and that is LOTS) makes me think it is something you ought to look in to, if you want good low to mid rpm grunt. Moderate lift and duration is supposed to wake up the stock 350 and still play nice with your oe heads and tune. For what my 1 cent is worth I think the cam you are looking for is the GM "Ramjet" p/n 14097395 cam.
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