351w / 420 Ford Roller Short block, 5140 CRANK, race prepped, 520+hp,28oz Cr

This auction is for a completely re-machined 5140 STEEL CRANK 351w race prepped stroked out  Roller block which becomes a 418/420ci stroked out stump pulling gear yanking tire burning Monster.  We've have had so many people wanting a short block version of our 520+tq long block in a version different then all their buddies that we decided to start selling them direct to the public in any reliable version we can offer. We also use a full forged flat top piston made for us to allow you maximum valve to piston clearance on almost any cylinder head you might have while allowing it to be a pump gas friendly build or we can also do a race gas higher compression version if needed as well as a lower compression ration for boost or nos. The machine work on the block includes; a complete cleaning and surface inspection of our blocks which starts by: being burnt and blasted in our cleaning system, then they all  get squared up by our BHJ fixtures which gives you a truly squared up deck surface after we mill them (a plus for holding a head gasket tight under high stress applications) and then they move on down the line to having their lifter bores gauged and honed with our Sunnen lifter bore honing tools (so that you won’t have to worry about lifters galling or a tight lifter that doesn’t fit right during your build and cause you great frustration) Then off to being line honed in our Sunnen line hone machine. From there they get bored .030 or .040 over in our CNC Rotler Boring Machine where we also maintain machine work squareness for more added HP and lower friction. Now they will be trial assembled and Clarenced for the 5140 4.100 Crank. Next they will go into our CV-616 hone machine where of course all of them get a set of honing plates put on them. (We have also seen a gain on the engine Dyno of at least 30-40hp, just from being honed with the honing plates vs. a 351w ford block .040 over with just a plain Jane hone job.)  This short block comes assembled with a set of .040 over real Forged SRP/JE/Mahle pistons  (Compression Ratios-Flat-top: 56cc-10.5:1, 61cc-9.9:1 or Dish pistons 61cc 9:1 or 56cc 9.55 or boost dish under 9:1) with one of those head combos or with Cometic head gaskets you will get you under 9:1-12:3 to 1 compression (we can figure out what head gasket will get you what you need) and if you wanted to add Boost or NOS then this is truly your short block. We also have included a set of ARP main bolts at no extra charge. The piston rings are file fit plasma moly and the rod and main bearings are Clev 77 large radius racing bearings along with brass freeze plugs and a set of Dura bond cam bearings which are installed in the block. (They are checked for proper fit and alignment before they leave so you don’t need to worry about your cam not fitting upon arrival.) The crank is a new 28oz balance 5140 steel with a 4.100 in stroke and 28oz bal, the rods are a 6.200 or 6.250 floated Scat/Eagle style SIR rod with ARP cap screw bolts.  We have balancers and flywheels if need for an additional charge, please let us know. Now we offer this short block in your choice of colors which are wide ranging (just let us know when you buy it) and we also offer a photo album build up of digital pictures of your engine, so you can feel like you’re in the room as we machine it and build it to fit your needs. (It’s also nice for the guy’s or girls like us who have pictures of our rides which started as a pile of nuts and bolts and ended up finished and at the local cruise night or out on the race tracks.)