1969 pontiac firebird 350 h.o.4/27/2024 Steady low between 15-18 "hg vacuum: This just low reading indicates retarded ignition timing. Check the timing belt or chain depending on the application. There's a good chance the vehicle has jumped timing. Steady low between 10-15 "hg vacuum: This reading indicates late valve timing. This leak should be easy to find because it would be making a loud hissing noise. Steady low between 5-10 "hg vacuum: This indicates that the engine has a leak in the intake manifold or the intake gasket. The engine should snap right back to a steady 17- 21 "hg vacuum. Normal Engine: On a normal engine, accelerate to around 2000 rpm and then quickly release the throttle. Im thinking my best bet is to get rebuilt heads they may lower compression or new ? But gotta same some money so rebuilt may be my option. So im assuming i have worn out valve guides ? Then out of no where i see vacuum gauge bouncing very fast at idle but not going over the 15 mark. So im still chasing 15 inch of manifold vacuum and rough idle and spark knock. Set initial timing to 8, and i see a max timing of 35 degrees with vacuum advance unhooked. So i pulled the Mallory Distributor out and put in old reliable G.M. So after chasing spark knock and rough idle and 15 inch manifold vacuum and i then find initial timing at 4 degrees ATDC. So since im new to this engine i got some numbers off Heads's ,Intake,Carb, Block.īlock Date code looks like L288, which means the block was cast on Dec 28, 1968.īlock casting number is 9790079 -So it looks like its not the orig block, but that fine by me. Well first thing is very rough idle and veh has spark knock bad with 93 octane. ![]() I picked up a halfway decent 1969 350 H.O.?. R&DMan on Vintage Review: 1968 Toyota 2000GT – April 1968 Car and Driver Road Test.Dead Swede on Curbside Astronomy: Sun And Moon – A Safer Way To See A Total Eclipse.VanillaDude on Jeep Wagoneer Ads Through the Decades – These Explain America’s Love of SUVs Better Than Anything I Could Say.1979 MG MGB – How Associations Are Formed Paul Niedermeyer on Cohort Classic: 1949 Plymouth Special DeLuxe Club Coupe – It’s Pretty Special To Me.VanillaDude on Vintage R&T Review: 1977 AMC Pacer Wagon – “What The Pacer Should Have Been From The Beginning”.VanillaDude on Curbside Classic: 1973 Chevrolet Impala Sedan – 666, the Number of The Beast or No More Sixes.Timmy V on Vintage Review: 1968 Toyota 2000GT – April 1968 Car and Driver Road Test.They didn’t make many of these and survivors are rare, I just hope it doesn’t end up as a “tribute” Trans Am or 400 HO car. I wouldn’t pay more than 10K and expect to spend another 8 or 10k to get it reasonably sorted out, but I’ll bet someone comes along and pays close to asking eventually. Aside from the cheapo respray over what appears to be original pale yellow paint it doesn’t seem to be too badly molested. Since it isn’t a bona fide muscle car, just a droptop pony car, it probably doesn’t matter much if the numbers match. This one looks salvageable, but I’d want to spend an afternoon with it up on hoist before committing. ![]() Once the tinworm bites these things it’s a losing battle, and half-assed crash damage repair from decades ago can cost more to set right than the car is worth. The key to determining the value is how much rust damage it has and if it’s ever been in a major accident. A lot like the ’68 Camaro SS396 shown here a few months back, except it’ll never be worth what that car could be. Well, I’ve been away from the market for cars like this a long time but this one looks about like a fair example would have ca.
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