Brent
I'd spend my money on the web site first. I just spent a few minutes on your web site. What do you offer any customer as compared to purchasing those few components listed on another site or direct from the manufacturer?
Do you offer any services? Is your expertise in building engines? Do you build engines on the side?
You need a hook to get the customer to purchase from you.
I would also narrow the pictures down. The picks on the right hand side were mostly off the page on my monitor, so I had to drag the slide bar at the bottom. I hate that.
If you are interested, my nephew designs web sites. Let me know if you would like to talk with him. Here is a site he designed and he is still working on it (its a big site).
http://www.woodys-auto-supply.com/