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He doesn't "need" to do anything unless he wants it faster. It's already a low 13, high 12 car. But yes, headers would be the first step in making it faster. Next, would be the Victor 340 and Holley 800, because he already owns those and they will work fine.

They are the Original X heads that have some work done on them. The work was done professionally but was done while the previous owner had it so I can't give specifics. Harland Sharp rockers.

The Victor 340, Holley 800 coupled with Drag Radials and Headers, will make the car brutally fast. Right now the car can destroy the E70-14s. If you put the Victor 340 and Holley 800 on, it will still destroy the E70-14s. That's the information provided above, in a nutshell. And that was my...

Did you use a high pressure pump?

Re-gear it and call it done.

I install mine right where the Mopar engineers decided it should be.

I bet if you had never had the opportunity watch your engine at high RPMs on a dyno, you would have never noticed that issue and it would have never caused you any problems.

I stand on the sink and use the mirror.

Yes, but is isn't going to make it run hotter. He is over 195 already.

Yes. This lower thermostat myth needs to go away. Look at it this way.... Let's say your car is ringing at 220 with a 180 stat. The 180 stat (if functioning correctly) is open at 220. Now, if you put in a 160 stat in an attempt to solve the issue of the car running at 220, what happens...

Oh, good point. I forgot about that. Along with my bad "new" cap and bad "new" thermostat, I needed to add a spring to my lower radiator hose because my "new" hose didn't have one. Here is a link for the hose spring. Yes, it's for a mustang but your radiator hose won't care. Mustang...

Does it run that temp at idle in traffic, when running down the highway or both? Coolant or straight water? Did you replace the cap and/or thermostat during the rebuild? Oddly enough. When I last went through my engine, I had some cooling problems. The new cap and thermostat that I had...

Are you running a PCV system?

I don't care if it's an x block, it's still a 340 vs a 410 but a person can screw anything up, so who knows.....

The 160 stat myth drives me crazy. Nice to see people recommending a 180 or 195.

Local hardware store. My local Ace Hardware has both chrome and stainless.

The engine already had a solid roller when I got the car back in 2004. The old cam was a Crower (the cam has been discontinued so I can't give the exact specs but it had a little less lift, more duration and about a 400hpm higher operating range). I have actually been running the combo from my...

I have a Victor 340 and a Holley 800dp in the garage, couple those with these. https://www.summitracing.com/parts/hok-5204-1hkr/overview/year/1968/make/plymouth/model/barracuda Or a similar header, should be a big change.

Ok, let's put the compression at a corrected and verified 10.7 to 1.

That's not an opinion, that's a question.

The cam. Voodoo Solid Roller Cam - Chrysler 273-360 273/279 - Lunati Power The rest of it. 1968, 340, balanced with forged stock replacement pistons. X heads with some moderate cleanup and port work. Factory cast iron intake and HP exhaust manifolds, both unmodified Factory 625 AVS, unmodified...

Good to know!

Someday, I want to post my combo here just to read the comments. I bet more than one person would pee their pants.

No, they are not interchangeable.

Don't forget that they sell a non-air gap Preformer RPM that may be better for a daily driver. Intake Manifolds - Chrysler - Small-Block - Performer RPM Series - Edelbrock, LLC.

I have ran a quicker 60' and higher trap speed with a 340, through stock manifolds, but that doesn't really matter in this conversation. If I were to make a list of things that could be causing his car to be soft off the line, stock exhaust manifold would be towards the bottom. I do agree...

Before I rebuilt my engine I had so much endplay you could measure it with a tape measure.

Exhaust manifolds, more than likely, are not hurting your off-line performance. I would look elsewhere for the problem. I'm not a fan of tall rear tires.

His goal isn't 450 HP. His goal is low 12s in a street friendly, pump gas combo.

Another question. Budget? I'm fairly positive you can reach your goal without a stroker and on a reasonable budget.