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So let's face it opinions/facts are constantly changing on a lot of popular upgrades . Many preferred parts have been ridiculed over the years as no good junk subpar etc only to find out that in the right hands and combinations there as good as the new stuff sometimes even better. The last...

My question is this when determining what size of head gasket to run in relation to the bore size should the gasket be the same exact size as the bore or is it optimum to be a little larger? Keeping compression as high as possible is also a consideration.

So you guys are making me lazy, instead of grabbing my volt-o-meter maybe you can steer me in the right direction I'm kind of scratching my head. I started the 340 swinger yesterday and after running about 30 seconds it just died quickly. As I try to restart it nothing, no cranking no clicking...

So okay pretty simple question but all I've only really worked on is small blocks what is the difference between a big block rocker arm and a small block rocker arm if they're both 1.5 I realize that the spacing will be different due to the larger head of a B or RB but it's a rocker actually...

So it's been over 20 years since I went through my 340 and so much has changed. I'm asking for recommendations for main bearings, rod bearings, cam bearings etc. As it stands now I believe it will be a 374 cubic inch 340. When it was put together it had Federal Mogul mains and cam bearings with...

So I'm going through my 340 this winter and I was thinking that I should break in my new flat tap solid lift 284 camshaft in my 340 before I rebuild it, my thoughts are that if something goes wrong I'm not sending scrap metal through my fresh rebuild. Also my springs are softer and it just seems...

I would like seasoned opinions on crankshaft material choice for a 450-500 hp 4 speed. Big clutch and 275 drag radials am considering a 3.58 stroke 340 . My question is would you feel good with a high-end cast crank like a 900 series scat or would you just bite the bullet for forged and never...

So even though Mopar performance camshafts have been discredited in some people's opinions I am a fan of the old DC grinds when used in inappropriate combinations. My question is how would you feel these two camshafts would perform in comparison to each other. One is a hydraulic oval track grind...

I ran across this video which I found to be very comprehensive on the subject and someone who speaks in layman's terms I believe he is an engineer for Yamaha or at least in their development program check it out. It did change my opinion a bit on the subject! youtube.com/watch?v=8NTgcxIqnUo

I have been fighting a motor shifting problem and I'm wondering if I have my motor mount brackets connected to the block improperly. I need to know if the brackets for the motor mount bolt to the front of the block eyelets or is the bracket position behind the block eyelets

So my 340 6 pack is developed a new issue of late. After shifting to nitto drag radials my motor wants to pull back where the mounts meet the pads I run solid motor mounts . I've loosened everything up got it straightened up and tightened everything down but now I noticed it's pulled back again...

After looking at the posts that were submitted on the crank breakers wanted thread it kind of confirmed my beliefs that most crank breakage were due to just inferior parts or from other events that caused breakage. I believe that the forged Mopar rods are extremely strong and also are blamed...

So I have traditionally run Cork gaskets with black permatex on my valve covers. I definitely prefer a cast aluminum or some more rigid style of valve cover opposed to light mild steel or tin style. My question is what do you feel the best valve cover gaskets are for a solid flat tappet cam...

So tell your story, have you broke a crankshaft? Was it cast was it forged and why did it break. They say the factory cast units will handle the riggers of super stock racing? And you know that's some stress! I personally am not to interested in theories or hypothesis nothing but facts ma'am.

How do you feel about the old 373 build? Which is the old 340 block with a 360 stroke crankshaft. It's one of my favorites I just love the bore stroke ratio ,piston speed and other dynamics of the combo. It is falling out of Grace with the low cost 4 in strokers what's your opinion?

So classic mistake, I bought a new fluid dampener for my 340 in anticipation of my rebuild. But in a gross oversight my new balancer is approximately 1/2 in wider than stock. My question is I know some of you are running fluid dampeners what did you use for a crank pulley or how did you solve...

I'm curious to see which block is favored and for what reasons. My question is if you had your druthers and could have a block delivered to your house for your next build which factory block would you choose? Assuming each block is a good rebuildable core would it be a la360 or LA roller...

Hello guys, I just purchased a fluid balancer for my 340 s i f approved it seems like a bit of a hog coming in it 12.5 lb my car is currently not here and I would like to know the weight of the factory forge crank 340 harmonic balancer?

I would like to start this thread for the six pack enthusiasts and gurus on this form. Six pack seem to be a bit of a hoodoo voodoo science. I have no interest in negative opinions of the setup only in helping those running them or that are interested in them understand and improve their...

So I'm a little confused, I was always under the assumption that moving to a solid lifter camshaft on a hydraulic la motor (340) required restricting oil flow via peening or bushing lifter bores. Am I wrong? lately I was told that no oiling modifications or changes need to be made. I know there...

These Pistons have made it to the shortlist for my 340 build. The motor will be sprayed on occasion, basically a 450 horse normally-aspirated 340. I mainly want to know of any experience that anyone has using this piston or if heard from a reliable source. Thank you

Lately there has been numerous posts on porting heads. It is amazing the amount of time and work and knowledge that some of our fellow members have on this subject. I would just like to say thank you for sharing all of your information with us. My question is and maybe it's been answered in...

So a few days ago my pan and drivers side header met its demise. a valley gutter and a poorly graded man hole ring created the perfect storm and smashed in my milodon street strip pan and header.I have had that same pan on for over 15 years and never even drug it one time but stuff happens ,my...

so lately I have been gleaning lots of info small block mopar strokers I am a die hard 340 guy and love that little over achiever, but times change and it time to go through mine one more time. my question is I now run close chamber aluminum heads so if I go with some dish or step piston on a 4...

after twenty-five years of fine service, I am changing out my induction system from my M1 single plane and TQ to a six pack set up. After six months of collecting parts from Canada to the East coast and back to Oregon, I have accumulated all parts needed. I bought a T/A manifold from Rocket, a...

help me out guys, can I use procomp la heads on a 1992 360 roller /308 motor and if so what mods need to be done

Hey every one I have been gone a long time ...new job,new home and some up grades to the swinger but good to be back! going to have some questions for you hardcore mopar lovers first off what the hell hapend to all the 340 six pack manifolds, I am going sixpack and purchased some nice carbs...

So I would like to know Information on Pro comp heads L A style ...flow, quality so what do you KNOW . thank you.

I am thinking of upgrading my rocker assembly . My cam is a circle track racing cam with 288 adv duration on both sides and 495 lift with 72 deg of overlap on 106 centerline . I will be running crane doubles and would like to know if a change to a longer rocker would be a good up grade ? Or a...

Hey Mopar kin, I haven't been around much I have Had a lot going on but I need some tec help my question may have been covered lately but here it is. I have been looking at White stainless steel roller rockers they seem like a great deal at 160.00 ...I run a hot hyd cam with 300 lbs at 500...