Easy way to make custom headers? What ??

Re: Turbo headers.
In terms of making a design that fits, they're easier.
If you're serious about getting a set made, look up Brian Slowe in Philadelphia. He does mostly 4 cylinder mopars, but will take on v-8 projects as time and interest permits.

Re: Calvin Elston
His blog Exhausting 101
He's also was an active participant at Speedtalk, so much more there. This is a good one to start with
"What is [exhaust] Blowdown Length?" p.2

Also some good threads on speedtalk about building headers.
Join the forum so you can see the pictures. The only e-mails you'll get are those from Speedtalk itself - maybe once a year or two.
First time header build - Speed Talk
Brian did a 421 on my car. Passenger side is really tight. 4 in 1 would be easier, and probably neccessary with a high Hp&rpm small block.
There's pictures there if you do a search.

Another system for mocking up headers uses pvc tubing. See
Stainless Headers Mfg., Inc.
They'll make up headers to your design using this system or any othe mockup you want.