I think that most engines I build get built on the *Lay-Awake Plan * .
In your case you are asking about a referral of someone you can trust that will hold the parts for you to pay them out. I can think of one guy that may. To tell you the truth possibly two. Just for kicks make a phone call to Littlefield and ask for Mert. He does a great job of bending over backwards to try to help racers. Possibly he will do this for you. He is honest and is a great guy. It is also possible that Gary Dyer might if he is still there at Dyer's Superchargers. Another possibility would be Bill Doucet in Louisiana. He is honest and trustworthy. His shop is Doucett's Machine.
Your best bet is to bank the money as you can afford it or put it into a pre-paid debt card and when you get enough saved to keep your eyes open for good deals. Doing it this way, if by chang=ce things for you got worse you can keep your money and have it for emergencies. If you send layaway payments some people will not give you refunds.
Ed.