Hey guys, I've been driving around my '91 Suburban with the 7427 swap for a couple of years now and it's been great with the stock '95 5.7/4l80e tune. I've been slowly gathering the parts and making the supporting modifications to drop in a big block and I'm at the point where it makes sense to start getting the baseline tune figured out. I've been told my setup is a common one so I was hoping one of you guys might have a good place to start.

It's a stock 7.4l Vortec long block bored .030 over with the Edelbrock TBI Intake and Doug Thorley Tri-Y's. Its running a '95 TB with the early big block injectors. Cam specs are pretty mild with a crazy (to me) 118 LSA
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I left a WB02 lead when I did the 7427 swap so I plan on getting that hooked up and have an Autoprom, though in all honesty I wouldn't mind driving it to someone and paying to have it fine tuned provided I had a good enough baseline to get there safely.

TIA!