The Autoworld kits are the most expensive because they are the best. There is a TON of work ahead, and this is one way to get the motor in the right place, at the correct angle using only common hand tools.
but everyone says its a bolt in and go???
I wonder if this "everyone" person ever did a swap themselves??
No it really isn't. Even have thought about selling the motor and buying a trailer and paying bills.
The cheapest and easiest part of my swap was buying the motor. It only got more expensive from there. If you have a running truck now, just drive it as is while you accumulate parts for the swap. Once you have EVERYTHING you need, you will probably only need a couple grand worth of parts to finish it. I went into my project thinking I had all of the big dollar stuff out of the way before I started. I was correct in that I had a motor, trans, bellhousing, etc, but the nickel and dime stuff in the last third of the project was ridiculous. I could not do anything that was less than $300.00. Anything. Ugh. Is it cool when it is done?? Yes. Would I do it again?? Man, not too sure on that one. I could have bought a LOT of fuel for that big block for what I dumped into a Cummins swap. It makes a cool ride when it is done, but there is a real high price of admission.
Not trying to tell you not to do it, but I really hate seeing nice old trucks relegated to almost permanent non-driving status in pursuit of a Cummins swap. Look around on various forums at Cummins swaps. Look at the start date of the build and then check the last post and see if it is done. Most are over two years old and still not finished. There are exceptions--some real nice ones at that, but these are the anomalies, not the rule. If you are having second thoughts now, it may be a good time to take a step back, drive the truck for awhile and reconsider the project.