im looking into short/long blocks myself. its either a 347 or a ls2 364. i already have a procharger d1sc. im fighting going iron for the money spent and time shedding weight off the car. iwas heavily leaning towards a 383 but for how i like to spin a motor(procharger makes power up top) im leaning more and more towards a stock stroke setup.

my goals arent to far from yours, @600 at the wheels on pump. i do know myself though,and in saying that i want my build for 800 rwhp. just for when im ready to max that sc out!!!!!!!

 

Lot of interesting comments in this thread. I dont build anything smaller than a 403. We dont feel it's worth a persons money to go anything smaller in most cases. They dont make the Ls1 stuff anymore so you have to find it in the first place. Then when you get a block you have no idea if it usesable. Building an enigne properly takes time. Checking each tolerance not just one and assuming the rest are the same takes time. Balancing and proper block prep take time as well. Line honing, using toque plates.... time consuming and an easy step to skip to save time and time is money.

Here is an example of your typical cheapest you can find engine. Pistons are in backwards...
https://ls1tech.com/forums/generation-iii-internal-engine/924763-super-technical-help-needed.html

Look for the cheapest parts you can find or cheapest short block and thats what your going to get. You get what you pay for in this business.

We recommend a Compstar crank due to the cost effectiveness of it vs an oem crank. You just dont shove a used crank into an engine and call it good. It takes time and money to prep it and thats where we feel its not worth it for the customer.

Our 402 is really a 403.. from the factory things arent always uniform so the cylinder is made uniform by removing some material to make sure the cylinders are round. Lots of little things to building a proper engine.

 

Can't believe that link, that would suck