Wayne, I have done several of the Kohler single heads. I have custom oversized stainless steel valves for them, and a valve spring package for the flat tappet and roller cams.

I have a Brand new 49ci Intek V-twin Block, Pan, and set of Pistons with rings for sale.  $350 plus shipping

You can run 4 stock steel push rods, or the new style larger diameter aluminum vanguard push rods. Both work very well and are inexpensive. And im not sure what you mean by "ec long rods", because they don't make vanguard rods. ARC Racing, PVT, and Rocket Ron makes billet rods for the vanguard. They all can be made to work well inside your engine and each use a different piston combo. The ARC rods and 40ci intek pistons will work fine for what you are doing.

If you are on tight budget, you probably shouldn't be running an "Outlaw" class, or a Supermod single/twin. That is what the lower classes are for.. The outlaw style classes are supposed to be for experienced racers and builders only. The racers in this category are not afraid to spend big money on what they enjoy and do what it takes to win.

Mike, I would love to see a class ruled this way. No gray area and straight forward. Plus, it would be easy to tech the machines and eliminate any reason for complaining for the majority (some people will still complain no matter what happens).

A high quality aftermarket valve is worth the money for the increased flow and the insurance of it not destroying your engine. If you can't find any for your engine, have some custom valves made. Briggs valves are not high quality and will eventually break in a high rpm racing engine, and when it does it will likely ruin most of the motor. Just send the valves you have to Manley Performance in NJ, and they can copy your valves in a nice stainless or titanium, or make them custom to your specs. Just make sure you know exactly what you want to order if you want them made different than the stock valves (head diameter, lock grove location, overall length etc.) Last time I had them made the stainless steel swirl polished stem valves were only around $40 per valve, and i believe there is a discount if you order more than 5 valves at a time.

The crankshaft orientation can be found by looking at the fourth digit in the Model number (first 2 are cubic inch, third is the design series). If the number is 0 to 4 in that spot it is a horizontal shaft, while numbers 5-9 indicate a vertical shaft. Your model has the number 4, so it is a Horizontal.

And based on the year model if the shroud is original, it will have the shaft mounted steel skeleton rockers. They aren't good for high rpm or spring pressures.

I have a nice 35ci Horizontal shaft Vanguard block, sidecover, and stock pistons. Engine had less than 100 hours run time. Cylinders are in great shape.  $125 plus shipping.

Send me a pm and I will get you the prices.

Yes all those parts will interchange.

Again, you would be better spending the money on a 38ci block, or at least a 35ci block rather than trying to bore the 30ci or make it a stroker. I've used just about every combo out there for the vannys, and the best way to go is start with the bigger ci blocks.  I have several 35ci horizontal blocks here I can make a good deal on. A good used 38ci horizontal is a rare find these days.

They have the same valve size in the 18-30hp engines, just some differences in combustion chamber sizes and shape.

The inlets are just pressed in so you should be able to move it without any problem.

Mike I have a few brand new ones here, ready to ship.

Not sure where any of those numbers or info came from. Any brand of engine if built correctly will make enough power to win races in the hands of a good driver. You can spend about as much as your budget will allow, and they all cost about the same to price to build. I would build a Kohler or a Vanguard. But the Inteks and Tecumsehs make great power too.  It mainly comes down to personal preference, or what engine you can get a good deal on.

There are a few different pto lengths for the 1" cranks so there will be multiple part numbers. Get the shortest one possible to get more weight off the crankshaft. Send me a pm and i will get you the crank you need.

The 1" cranks are easy to find for the Kohlers. As chuck said, all the Kohler command v-twin cranks are interchangeable for both horizontal and vertical engines from 18-30hp, the 30hp crank just has a slightly longer stroke. I can get brand new 1" cranks pretty cheap, they are new old stock from a distributor or pull outs from brand new engines.