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Does anyone use those clear see-through float bowl plugs? Seems like that’s a great idea rather than spilling gas anytime you wanna check float height. But I’m not sure if they work very well. Oh and are these used just as a diagnostic tool or run permanently?

So I am in the process of replacing my intake manifold. I noticed my M1 thermostat housing and thermostat is smaller than my replacement manifold. It’s significantly larger. M1 hole diameter 1.5” bolt sep 2.8” New Manifold 2.1” “ 3.25” What gives? Is the new one set up for...

Well?

Quick question: If my intake manifold fits perfectly with no gasket but then I add my two intake gaskets and the manifold is too high the: Would the right amount to have the machine shop cut off on each side be as simple as the thickness of the gasket?

Not sure what motor this is. Can you identify it? Looks like either a 5.2 or 5.9 magnum automatic?

Is there a date/year for when Mopar started hardening head valve seats for the 340?

So I have a low profile (and it needs to stay low profile) mechanical secondary and carburetor set up on my 340 automatic. Running a 6AL box with a MSD Billet 8534 non vacuum dizzy and a 4150 Double pumper with mechanical secondaries. I understand this is not the best set up for drivability in...

Anybody knows how Edlebrock measures Intake Manifold Height? Is it from the top of the base or from the bottom? Or is the measurement based on how it sits in the block? If so where is the reference point? 7576 Air Gap 5.35” 2176 Performer 4.63” 7176 RPM. 5.35”

Anybody have any recommendations on a set of intake manifold gaskets for my 340? I don’t do this enough to know what works better than what…

Just a few questions regarding LA intake manifold bolt lengths. Are all the bolts the same size or are there two that need to be longer? What length is needed as I am installing an aftermarket aluminum intake (the cheap *** ones for magnum/LA). Will 1” work or do I need longer? Thanks

Guys what the best hose to connect this tight turn connecting the water pump to the intake manifold? The hose I was using just wasn’t quite right….

I am trying to drain my coolant before replacing my intake manifold. My 340 coolant plugs wont budge and I don’t want to brake them and have to pull the motor as it would be to tight to drill and tap under there. So I drained from the lower radiator drain **** and also got the rear up as high...

Hey guys. I might have an option to get a Magnum 360 to play with for my 1970 Sport Satellite. Its drive train is set up for a LA Small Block. Other than an intake manifold and carb, cam what else would I need to make it work? I currently have a 340 in there with headers. I assume the headers...

Guys whats the deal with these heads? Anyone use these or have experience with them?

Hi I thought I would post a new thread on some specific questions I have regarding intake manifold for the 340. My 340 is in a 1970 Sport Satellite. The engine has an unknown cam and 12:1 forged TRW’s and I believe is solid lifter. I plan to rebuild it for the street. I do want around town...

Hey guys! I am having a real challenging time getting my 340 with an M1 single plane intake and a Holley 4150 to fit under my hood on my 1970 Roadrunner with an Air grabber hood. I have a few questions for you guys regarding the M1. 1. Is the M1 that much taller than an Eddy Performer or Air...

I couldn’t find anything on here regarding the availability of these heads although I am sure there is plenty. But I was wondering what the status is on production over at TF? Seems like these heads have had a single short run and then stoped. I know CV19 etc but anyone got any news on what is...

So it looks like there are some options on the length of stroke one can get in a particular crank rod piston combination. From what I gather.....the longer the stroke the more displacement BUT also the increased risk of interference on the assembly. What are the trade offs to be made? What is...

What are your thoughts about stroking my 340 with pistons and crank only and using my original factory rods? Will that work? Will that save me money? I would think the factory rods assuming that I have factory rods are as good as most current stuff out there?? Thanks and Merry Christmas guys!

Merry Christmas everyone! Can you guys explain what might need to get clearanced in a 340 stroker conversion? Lets assume flat pistons at zero deck. Let it rip…

Can you guy comment on the compatibility of headers I am using on my stock cast 340 heads to that of an Eddy for a Magnum? Can they do they …. Port matching?

Who originally produced the 340 6 pack intake manifolds and were they aluminum or cast steel? Are there any aftermarket manifolds being made? I looked on Edlebrock’s site and they only have the BB version. Lastly what were the differences between the big block carburetors in the 6 pack config...

Anyone know if the 318 crank in 1970 was forged steel as opposed to cast? Was it shot peened? Any info and markings would be helpful!

Hi I am still on the fence regarding a rebuild of my 340. I know if I posted a question like “Whats a good combo for my 340?” Everyone would have an opinion even if they never built an engine let alone a 340 (not that its special but specific). Also I am aware what is “good” for one application...

I have a few questions as automatics are new to me. Is there a Thrust Bearing in a 904 to Crank assembly akin to the pilot thrust bushing or roller bearing as in a manual crank? I never saw one so that might be a simple answer. My real question is what is the assembly procedure for transmission...

Ok were talking cast crank to cast crank weight balance difference from a 340 vs 360. I am asking because some harmonic balancers come with two weights and some only with one? So is there a specification that someone can share for crank counterbalancing? I have a hard time believing that the...

Looking to purchase a harmonic balancer. If you have good/bad experience and recommendations I would like to hear from you. I believe its got a cast crank (1973 Block but was rebuilt) so it needs to be an external balance or come with weights for internal/external option.. This is for a street...

Hi, I just did a static compression test for helping sort out a bunch of other things. So I just would like to focus this thread on static compression testing procedure (not sure if I did it correctly) and to share my numbers because they were higher than I anticipated and not sure what it...

Guys looking to decide over a 3.55 or 4.11 still. Have been reviewing my old threads as well as others. Ran some numbers and wanted bounce off conclusions from this and if I am missing anything. I used the Spicer calculator. Red dotted lines are approximated power band. 1. My 2.71 never makes...

Looking for a definitive way to determine the correct stall for a given application. If (and I don’t) had every piece of information about the application of my car how exactly does one calculate the correct converter stall RPM? I have searched the web only to find lots of companies making...