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    273 commando cylinder head bolt torque specs ? same as 340 ?

    all i wrote, i in regards of torque is from personal experience, i have always used moly lube on my head bolts and main bolts, by using moly lube , you will have more clamping pressure without distortion. i used on my 273 and my 340,.i know arp wants 100, lbs, you will pull block deck up...
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    273 commando cylinder head bolt torque specs ? same as 340 ?

    273 calls for 85 pnds torque, i found if you torque above that, it distorts the block deck. my 340 i use 80 # torque , also i use moly lube on bolts, also i torque in steps, 40, 50 50 70, 80. i ran into this issue long time ago.. i have customer, runs a 340 @ 10.65 cr, i torque heads at 85...
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    rocker shafts installed backwards... long read. but pics!

    before installing timing chain, soak it in a can of engine oil, for half a day, then install, it. chain will last longer. old motorcycle trick. just food for thought.
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    Big Valve X Heads on Low Comp 72 340

    the 587 head does flow better, over the 915 head, best to install sst one piece valves, that helps flow and velocity. in stock, low comp 340 are as fast as, the higher comp 340's. just food for thought, i've found the 1.88 valve has more velocity over 2.02.
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    273 Rods work in a 360?

    yes, but 273 rod has a bushing in it, 360 uses a pressed pin. piston needs lock ring grooves cut in pin bores, unless you're using after market, pistons, some come with lock grooves. just food for thought
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    Cam Degree Question

    with dots at 12 crank and cam at 6, it's on # 6 tdc. # 1 overlap, both dots have to be at 12 clock then it's # 1 tdc, now can degree cam correctly,
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    Cam Degree Question

    i assume , when you degreed it, dots were at 12 and 12?? when they are together, you're on # 6 tdc. dots at 12 and 12 is # 1 tdc, then cam will degree correctly.
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    PRP Velocity Lessons

    few years ago,i went to a flow seminar put on by superflow, harold bettes , vp of super flow conducted the 8 hour class. it was very informative class. he stated, that engine doesn't pull 28 " of vac, if it does, you are loosing power,, my bench is calibrated at 25 :, he also stated, that 20 ...
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    Bronze valve guide liner install J heads question for machine shop guys...

    bronze liners require an install kit, k line sells those
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    Internally balanced 340 questions

    turn balancer over see the front face , if has no horse shoe, then its internal balanced, also external will have stamped on it 340 external only
  11. P

    273 Commando with roller camshaft

    usually have to sleeve right side lifter galley to use roller cams. from mopar race manual. can get very expensive . probably have piston to valve clearance probs
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    65 dart 273, No fuel from pump to carb!

    can hookup an electric pump to line off man fuel pump, and suck gas up through it. between carb and pump., i've done that before, it works
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    65 dart 273, No fuel from pump to carb!

    where are your filters at? after the pump or before ?
  14. P

    273 dilemma

    a 318 or a 340 crank are the same, casting numbers are same. both are steel cranks
  15. P

    Spark plug gaps

    in my stocker, with msd 7al, run .060 gaps, also, use a standard length plug, not a extended tip plugs, also can run more timing , this is a 72 340. at track , opened up gaps from .045 to .060 ran .05 faster and .75 mph faster. btw, i use NGK plugs. just food for thought. btw it's a B8es plug
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    Spark plug gaps

    with msd 6 , we ran .045 gap
  17. P

    Are the Harmonic Balances interchangeable?

    both are internal balanced, will work
  18. P

    Oil filter adapter vs remote oil filter

    actually, had a guy show me, he uses a bread sack wraps around filter, then unscrews it, no leaks, just food for thought. it's contained
  19. P

    Oil filter adapter vs remote oil filter

    we use the short filter on the 90 deg adopter, more room to get to it, napa 1068 filter, when changing filter i place a rag over header tubes , just food for thought.
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    compression or flow?

    more air flow will produce more cylinder pressure , which makes more power, years ago. had a very sharp engine builder, stock n s/s said , he would give up .5 comp for more air flow or bigger cam. will go faster. just food for thought,
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    J Head with no casting numbers.

    i have 7 587 heads with a J cast number on them.
  22. P

    Hyd Lifter refinish .

    oregon cam in vancouver usa can cut lifters
  23. P

    Rotating exhaust valves

    the multi groove locks allow the valve to rotate freely i read this in an article the intake locks grip the valve , the exhaust do do not. take a lock and grip it, then rotate the valve, i've done that, just food for thought
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    318 Scratch free cam install. The hard way.

    we use a long bolt threaded into cam snout easy way to feed it through cam bearings. even using the oil pump drive gear will work, pushed into snout. also, we install cam with block upside down can reach in and hold the cam . just food for thought
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    Purple 340 cam

    oregon cam will be best bet, ken has lots of info about cams. he knows cams .
  26. P

    Any gains adding 1.6 rockers to stock 273?

    you have to elongate pushrod hole area, reason is they hit at max lift, i've done that for others . there's not much improvement for money spent, just food for thought. heads have to come off to elongate pushrod areas.
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    Crankcase ventilation with blow through supercharger

    pan evac does not work with mufflers, creates back pressure to engine. made for open headers only. i've seen this before, guy blew dip stick out, with pan evac, and mufflers, .just food for thought
  28. P

    Main cap question?

    doesn't matter which caps, still needs to be align bored. the 273 caps are strong enough to support crank. also have to find a set of stock caps, from another block. stock caps are not available as new,
  29. P

    Main cap question?

    block will have to be align bored though. torque is same for 273 and 340 bolts
  30. P

    Main cap question?

    they will fit, use 273 bolts though, as caps are shorter.
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