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90 or 91 octane ethanol free here in NE Texas. I won't run corn gas in my hotrod '73 Newport if I can help it. Always with Pro-Long fuel stabilizer, as it may sit for weeks or even months at a time. Lots of boaters out here in my neck of the woods so real gas is plentiful. 400 motor isn't...

Back in 2020 when I put Project Turd back on the road, I was concerned about ethanol blended gasoline. With a background/education in auto mechanics as well as chemistry & physics, I knew rubber and ethanol don't play well with each other. So I made it a point to replace every last single inch...

Check for leaks.

As was stated earlier, 73 was a low compression smog motor. I couldn't (& still can't) afford aluminum heads for my '73 400 Newport, but if I did, my choice would be either 440Source or Edelbrock RPM heads. I went with flat top pistons and shaved heads. I made sure to have the intake manifold...

2 stroke or Marvel Mystery oil added to the fuel will only help with the valve guides from sticking, sticking/ticking lifters are treated by the oil. As was stated earlier, it's likely dirty oil, or even clogged lifters (baked on varnish from old, broken down oil or trash). That crap needs to be...

If you're on a budget, choose the heads that have the smallest chambers, send them out for a 3 angle valve job and hardened seats and invest in a Dremil. Not one of those cheap Harbor Freight knockoffs either, they'll fall apart within the 1st ten hours of use. (Ask me how I know). Then watch a...

It's a "B" motor, a short deck big block (383, 400). Regardless of the heads, you need an intake for the block. "RB" blocks (raised block, or tall deck (413, 426 wedge & 440) have a longer bore so they have a taller block, which makes the intake a bit wider so the two intakes won't interchange...

I've always loved finned covers, got a set on my Newport. Also found a matching air cleaner lid that matched, painted between the fins & the block to match the body color. I got around the extra grommet hole with a push in breather and used the screw in plug with a chromed fill cap on the one...

If you're burning the cheap stuff (ethanol blended gasoline), it'll eventually eat thru the rubber fuel lines. Getting to the hoses under the hood is easy, the hoses from the tank to the hard lines along the bottom of the car not so much. When I rebuilt Project Turd, I nearly had to drop the...

They're gonna be stiff to turn. You're gonna want either a breaker bar & a cheater pipe to give extra leverage, OR an impact gun. I always reach for the latter. I'm too old to pull a muscle fighting a bolt. These had to ensure positive clamping force to secure against full throttle pressures...

For a street motor, the misalignment shouldn't be noticeable. The bolts may need some "encouragement" to get started though. On a race track or the autobahn, you may not get top end like before because of the mismatch in the intake ports causing turbulence. Cbody76 is correct about hydraulic...

Everyone is talking about power reduction and the kid wrapping it around the tree, but no one has addressed the elephant in the room. It's a STATION WAGON WITH BENCH SEATS! Does anyone remember their teen age years? Hormones! You're concerned with him going to fast in the road, what about going...

You asked about cams, no one responded to that question. Hmm... I run a Stage 2 cam for that muscle car rumble. Camshaft choice is dependent on the intended usage, are you building a daily driver, a race car, or a weekend warrior? Is this a hot rod or a restoration? You didn't say what size...

Good call on the Eddy squirtbox. SuperDave approves. If dialing up the idle mix screws yielded positive results, you're on the right track. If I may be so bold, I recommend ordering a rejet kit for this, along with a vacuum gauge to assist calibration. The Eddy name-brand kit comes with color...

Hey Jerry, I don't want to come over as a know it all, but not that long ago I had a similar issue with my ride running hotter than it should. Someone suggested I "test" it with the choke partially closed. This can be done with bailing wire or even a zip tie, rig it so the choke only opens up no...

I'd try to rebuild the carb 1st. If that doesn't do it, a NEW replacement carb for the Carter (discontinued - bought out by Edelbrock) would be the Edelbrock 1406. I have one on my 400 (stage 2/purple cam & headers). Electric choke, flows 600 CFM & is based on the Carter AFB 4bbl. As long as...

I say go for it! I would love to blow a wad of bucks into my Turd if my budget (& wife) would allow it; poked & stroked, 440 Source aluminum heads, long tube headers, Holley Sniper EFI, make it produce 600+ ponies at the wheels. But doing so would necessitate upgrading the rear axle, as the...

They do, but only to a certain point. They are flame tempered, not friction tempered. Flat lifter cams will "marry" each lobe to the lifter that was installed on it during break-in and thru out the engine's lifetime. Once they are broken in, if you ever pull the engine apart for service, each...

I just recently rebuilt my 400 in my 73 Newport. Still breaking it in. According to my research, consulting the machine shop that tooled my block & crank, and the camshaft break-in instructions, I ran ZDDP additive with 10W40 oil, I installed a magnetic ring onto the bottom of my oil filter(Home...

Thanks for the input guys. The car itself has rolled the odometer, perhaps more than once, so it's already high mileage. The original 400 heads are 2 bbl heads with the smaller valves, ports & 88cc Chambers. These 'new' heads have bigger valves & 79cc chambers, should result in better breathing...