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I run the K&N HP3001 made in USA by Champion. They are very well built filters and the 1” nut on the back is an added bonus to loosen the filter off on my 340.

Hydraulic

My factory 273 adjustable rocker arms and shafts that are on my 340 do not have the banana grooves on the shafts. They must be ‘64 assemblies…?

I'm running the L2316 in .040" in my '69 340. I think the piston to cylinder wall clearance is way tighter with those pistons than any modern forged pistons.

Unfortunately original post member @FWDLK Frank hasn’t been active since Dec 4

These were the specs Ken at Oregon Cams quoted me in an email. 221/227 @ .050", 276/309 adv, .438"/.456" lift He also said he could grind at 112 or 114 lobe separation angle.

I would be interested in a ‘68 340 4 speed cam. Any updates on this project?

I did this conversion back in 2001 or so. Yes, I used my original Slant 6 date coded alternator on my 340. Been working great for 20 years now. You will have to change out the engine wiring harness only as the components on a 340 are in different locations than a Slant 6.

Multiply lobe lift by 1.5 to get the advertised lift.

I have a cam with no numbers on it too. I put it in an block and measured the lift and duration to give me a hint of what cam it might be. If you don’t have a spare engine block you can use vee blocks on a bench with a degree wheel.

That’s what I’m hoping to get away with, a light honing. Thanks for letting me know your experience.

Thanks for the info!

Thank you for the great advice!

No, the engine has very low miles at 0.040. I was possibly thinking of freshening it up and adding the stroker kit if the cylinder wall to piston clearance with the new pistons is within spec.

No, I’m at 0.040 right now.

Hello fellow FABOers Does anyone know if Scat or Eagle offer a stroker kit for a ‘69 340 with a 0.040” overbore? I’ve searched on-line but have only seen kits with 0.030” overbore pistons. Thank you!

Here it is:

Love this book! It was my very first Mopar book I ever bought and I still have it. I bought around 1986 and used it solely to rebuild my 318 in my ‘73 Dart when I was 16 years old. I vividly remember a picture of them filling a 273 radiator with a caption saying “If we water it maybe it...

There was a lengthy thread about this subject a few weeks ago.

Do they have these stroker kits for a .040" over bore 340? I've only seen them in .030" over bore.

I have a set of 273 rocker shats with no banana grooves. Does anyone know if some stock 273 rocker shafts came without banana grooves?

Try the rear main seal out of a Magnum engine. The crank rear main seal journal is slightly smaller on the Magnum versus the LA making the seal slightly larger creating a tighter grip on the crank when used on the LA. It is also made of a softer silicone rubber. It worked on my '69 340.

I measured my '69 X heads at 75 cc's. I had them milled down to 68 cc's. (forget how much milled) I was at a performance clinic put on by Herb McCandless and he even said the X heads were more like 75 cc's and he had never seen a set at the advertised volume of 63 cc's.

What brand of brake-in oil did you use? If it's Joe Gibbs BR oil, I would call Lake Speed Jr. (Chef Tribologist at Joe Gibbs Driven Oils) directly and ask him what he thinks of the color of the oil. He's an awesome guy to talk to and extremely knowledgeable on everything oil related. Here's a...

It might be moly and zinc which is I believe brake in oil is heavy in. I would cut the oil filter with a large pipe cutter or chain cutter and look in the filter pleats. The oil flows from the outside of the filter towards the center.

I’ve done it on my ‘69 Dart with a 340 a few times with the engine installed but on a hoist. The Center link has to be moved over to one side. I think I unbolted it at the idler arm side, separated a tie rod end and moved it over to the driver’s side. The oil pan has clearance from the k frame...

Very good article by Joe Gibbs Driven Oil chief "tribologist" Lake Speed Jr. All about oil: Lake Speed Jr breaks it down I attended an amazing oil seminar put on by him. The Joe Gibbs Driven Oils have had some serious research and development in 10000 RPM flat tappet camshaft engines.

My factory '69 x heads cc'd at 75. I didn't think it was possible to be so far away from the advertised 63 CCs but Herb McCandless confirmed the fact that x heads were more like 75 CCs on one of his performance seminars. I milled mine down to get 68 CCs for a true 9.8-1 compression ratio.

Who is the manufacturer of the adjustable vacuum diaphragm? Thanks