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I think this video of my car taken when at 156K. Curriousyellow71 behind the wheel.

My 09 R/T 5.7 Challenger has 170,000 on it. I put gas in it and change the oil (5w30 synthetic). I have the MDS disabled. My 06 Magnum R/T was on its second engine before it made it to 100K. Had a marshal reman in it when I bought it at 115K. I think they forgot to put in the back cam...

I am also onboard with the 2266 swap idea too if stick with simple is the goal. If you want to run on 87 octane and use off the shelf lopey cams your better of in the 8s for compression. The newer 2295 have a narrower pin and are 30 grams lighter than the old 2295s. If it is an old 2295 I...

For a comparison. A smaller rattler cam 281*/289* @006” 227*/235*@ .050” .480” ish lift 109* LSA 67* of overlap Will pump 154-165 lbs of compression with the compression dropped to 9.3 The Bullet cam I mentioned has the same overlap, 67* if it is ground on 114LSA. It pumps 165-175 lbs of...

Maybe I missed it. Are you looking at flat tappet cams or rollers?

The thick head gaskets would probably work, then you could do a smaller cam. I think you still needs a bigger E/I cam split with domes, so a rattler probably isn’t a bad choice. Your engine builder might be cussing at you, nothing lines up very well on the top ends with the thick gaskets like...

Some things that don’t mix are leaving the compression high and not wanting to rev the engine much, and using a single plane intake. If you don’t want to rev the engine those domes need to be machined off, it needs a dual plane intake with a smaller cam to match. If you leave the domes on...

When a bunch of SM parts get put together and everything works out as planned. I sit back in amazement. Don’t get me started on Speedmaster stories! LOL

You can get a bare set of actual Victors for around $790 each with valves from companies like Hughes. They are not exactly expensive.

I recently ran into someone having to replace the springs, valves (cupped tips) and guides (using oil) after a summer of driving on a set of Speedmaster heads. Tommy Boy comes to mind:

For pump gas if the compression is on the high end for the octane we often make the split 8 or more. I think it depends a lot on how well the exhaust flows. It is different also with a full exhaust on a street car. When you add more duration on the exhaust it allows the engine to pump more...

Some cams also have different acceleration rates between the intake and exhaust, and that changes the way the engine scavenges too and is another thing to consider when considering the LSA. When you compare the cams with less acceleration on the exhaust side to a single pattern cam, the single...

I think I recall you saying planning for 3000 stall. What gears and tires do you plan on running? And what weight do you think your car will be? Keep in mind if your basing this new 440 combo from the experience of the previous SBC Elgins combos there are differences in how cams are ground...

We went that direction with a lot of our cars, still have some set up with tighter LSA’s, some single patterns. We got to the point on some cars that all more mid range push was going to do was make them hard to hook up, especially on the street. We went to bigger cams, bigger E/I splits, 8 to...

There are several reasons 400 SBC might like the narrower LSA, and why BB mopars usually are wider LSAs. The SBC usually have quite a bit less port velocity at the same RPMs as the BB Mopar, and the Chevy has a lot shorter intake track than the big block mopar. The lesser rod to stroke ratio...

.030” below the deck sound correct to me for 1970. Seems like I recall the 70 383 and 440s were about .030” to .040”shorter than the 68 and 69. Our 383 is set up with pistons that are .004” from zero deck, and has the heads milled .070” to 72cc. It is just barely over 10. Not many factory...

If they only made fenders for a Coronet. That is more frustrating than the price. Lol

I think there are several factors present on cam failures. For the most part, if you loose one lifter or two, either right after break in, or after several thousand miles, but after the failure, the rest of the cam looks good, that is either soft metal or improper machining on those lobes that...

I think HR5 is pretty much as good as it gets in these old street driven engines with flat tappet cams. I once drained the oil on an engine that had a zddp additive in it, the zddp additive came out first, then the oil. Not exactly what you hope for with an zddp additive. Lol