title says it all. Beefy lookin, but want to know what their length is.

 

same as all the rest of the 385 series engines 6.605", the 370 uses the same stroke as the 429 with a smaller bore than the 429/460 does.

 

No, they're not the same length. I've set them next to a 390 rod and they're noticeably shorter. 390 rods are 6.490.

 

I also measured the pin height of the 370 piston and they came out at 1.82, which with a 429/460 rod and the 429's 3.59" stroke, would put it .010 down the hole at TDC, not what a truck motor's piston usually is.

 

the 390 is an FE motor and the 370 belongs to the 385 series motors ,two entirely different motors

 

actually baddad your math is off, 3.59/2=1.795 then using your pin hieght measurement of 1.82+1.795+6.605=10.22 crank centerline to piston top. nominal deck hieght on a D9TE block is 10.322 so 10.322-10.220=.102" in the hole, now go measure one and you will find that is pretty darn close.

Just for grins and giggles I looked up the 429 rebuilder pistons from silvolite, and the compression hieght is 1.882 which is probably the actual true pin hieght on that 370 engine, and that leaves the piston in the hole .040.

 

Yea, I may have goofed on the math, but the fact remains that next to a 390 rod (yea I know they're two different engine families, but rods are rods) the 370 rod is noticeably shorter, and I don't have a long enough set of dial calipers to accurately measure them. I wanted to list em on ebay, but need accurate info to help them sell.

 

Actually they DO share something in common--- they both have the same size bore-- 4.05

 

I don't know what rods you have but the 370 uses exactly the same rods as the 429 truck motors do, they have the same stroke, and same compression hieght on the pistons, and all the 385 series engines used the same rods.
Ok do this, using a tape measure, yeah I know it's not very accurate but it will get you close meassure those rods and tell us what the length is by that. also what is the casting number of both the rods, and the block your working with.

 

Bad,

I can't do that thar fancy math, I've only got 21 toes & fingers.....but I'm staring at a 370 rod, guaranteed (or at least as guaranteed as anything- I know the history & pedigree of the engine & vehicle from when it was new) & it is the same ordinary truck rod, 6.605". I've seen a number of 370s & they all had common, everyday truck rods, nothing special about them. Dunno what you've got....

I would never claim to be a 370 expert, but I've never heard of any of them being odd or altered in specific years; they're just boring ol' medium truck engines, Ford never bothered to do much special engineering on them.

 

Ok, I went and looked at the Silvolite site at 370 pistons and the ones I saw had a 2.12 pin height, not 1.88. That would put them out of the hole with 6.605 rods, by almost a 1/4". Do the math and the end result shows a rod length of at best, 6.405". That's close to what these rods are compared to a 390's 6.49.

 

MB, you were lookin at 361 pistons. Those have a 1.88 P/H. And are just above the 370's in the chart. And I did do the tape measure thing, and they were shorter than 6.5", that's why I wondered if some one knew their actual, accurate length. Just from memory, the forging numbers are D9TE, don't recall a suffix. Block is history, it went to the scrap yard last year. Had no use for it, and the bore-cores were too small to over bore it more than about .060. I salvaged the pistons, rods, rockers and fulcrums.

 

No I didn't look at the the 361 pistons I looked at the 429 68-71, the 429 for 79-90 says they are 2.14 so even worse.
Ok you have the right casting number off the block, just like what I posted but what is the casting number off the rods you have in hand that would help identify them, because so far this isn't adding up.