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Thank you everyone. I will not use a lockwasher and the engine will be broke-in inside of the car. I have thought about snugging it now while on the stand and then finishing the torque once I have it in the car. But I am afraid that I will forget. I like the note on the windshield idea! I...

I want to install my harmonic balancer this weekend on my 340/420. I have the balancer installation tool and I have torqued the balancer bolt with the engine in the car a handful of times. I made a bracket that bolts to the balancer, and rests against the k-frame to keep the crank pulley from...

I use this ProGear set mentioned above (Hughes Link). https://hughesengines.com/Index/products.php?browse=category&level0=QS0gU21hbGwgQmxvY2sgIkxBIg==&level1=VGltaW5nIENoYWluICYgQ29tcG9uZW50&partid=23311

Anyone running into issues with valve spring delivery dates? I ordered a set of Manley springs/retainers/locators 5 weeks ago and the retainers/locators delivered in 3 days. I am now approaching week 6 for the valve spring back order and still have another 4 weeks to go. I have 4 other valve...

I am using aluminum heads and water pump. The heater core and the radiator are the stock type replacements. Thank you everyone.

I am thinking ahead of what type of coolant to run once I get my 340/420 back in the car this Spring. The engine was completely cleaned, and my radiator and intake were cleaned out too and sitting dry. I will be using new radiator hoses, and then the only other pieces are the heater core/hoses...

Cometic makes a #C-5457-036 (4.125" bore x .036 thick) for a reference.

Do you guys worry about the temperature in your garage/shop etc., when applying the sealant? This time of the year in my garage, it can be 50 or 30 degrees. I need to get my water pump housing/water pump/oil pan sealed up in the upcoming weeks and I have wondered if the temp will affect the...

I finally got around to degreeing the cam today. (109 installed at 105 per cam card) I first chose the 3A option and it came in as 102.5. Then I chose the 2A and it came in at 106. I’m good with that. Thanks everyone

For discussion, this is the X-celerator with the Mr Gasket 5840 gaskets. There is a lot of meat left in this intake.

Thanks for the confirmation! This definitely moves the 360-3R off the table for me.

If that is true, I was not aware of that detail. Thank you Michael!

I agree that it is a mismatch combo, but I am going to work on that over the next year or so. This is a numbers matching 340 car that I have had for 23 years. I lost the crank about two years ago and I am just now getting it back together. The heads are ported Sidewinders (280cfm @ .550”). I...

I have started assembling my 340/420 and I need to start deciding on which intake to run. I currently have the following two intakes: Non-Airgap RPM Weiand X-celerator (small single plane) I have gasket matched both of these to the same intake gaskets, and the depth of the match is about the...

""the longer the stroke the more displacement BUT also the increased risk of interference on the assembly."" My 340 now has 4.00" stroke and a 4.090" bore. The crank and rods are from K1, and my machine shop had to clearance around the rod bolts (ARP 2000-10) which can be seen in the attached...

I also followed these instructions for the timing set. I started dot-to-dot as shown and now I will follow the second picture to advance the cam 4 degrees.

I followed the Hughes cam installation and now referencing the Pro Gear for advancing the cam. I’m glad I only change cams every 3-4 years .

Dwayne, The Pro Gear timing set that I am using: 2A = 4 degrees. This was my confusion. Thanks again!!

Thank you for both posts!!

For some reason, I was thinking that if I need 4 degrees, I need to advance it half. Thanks!

My instructions said to get #1 at TDC and have the sprockets dot-dot (cam at 6:00 and crank sprocket at 12:00). Thanks!

I just installed my cam and with the sprockets at Dot-To-Dot, the centerline comes out at 109 which matches the cam card separation angle. The card says to degree it in at 105. Do I just advance the cam sprocket 2 degrees and check the centerline again? Thanks!

I am now looking into a couple of the Comp springs (985 & 925) instead of the Isky's (6105SP & 8005SP/8005A) that I have been looking up. The Iskys are taller springs and they are showing .140" or more clearance to coil bind at my max lift range. I believe that I can get the two Comps mentioned...

I will plan on having enough spring/shims to be able to hit the upper range that I was given as a minimum, and maybe stay slightly higher just in case the springs lose a little after a few heat cycles. Thanks everyone!

The 14-16lbs reference puts me in or knocks me out of the 145-150 & the 350-360 ranges. I know that I am being anal about it, but if I shim for the ranges and the springs do lose tension, then I am under the range. If I compensate for the 10% loss and they don't lose, then I am over the ranges...

I have my cam on order, and I have my recommended spring specs (145-150lbs & 350-360lbs). I have my springs chosen (“ISKY” 6105-SP) and now I am trying to dial in my installed height (on paper, as I will check my actual lifts after the cam install). I was told by the cam company that the new...

Cam Update: I had a few phone calls this morning with Bullet, and I am going with a solid flat tappet. The cam that I pulled out of this block was a 234/238 SFT, so I might be able to reuse some of the valvetrain. This cam specs out as a 252/256 @ .050, .365"/.365" lobes, 109 to be installed at...

My 340/420 with K1 4.00” crank and rods had the same issue. My machine shop took it back apart and clearanced it as needed.

This is the gasket that I am currently looking to buy in the next week or so. Cometic C5457-036 Cometic MLS Head Gaskets | Summit Racing

Mike Jones (Jones Cams) might be an option too. I know he sells The Bam brand lifters.