Got a 97 chevy x-cab silverado i yanked the 350 and put in a HT383 from GMPP. Want to ditch stock injection, had anyone out there in truck land ever done a swap like this, looking at going efi still

 

Plenty of options out there. People have used gmpp ramjet manifold, mercruiser vortec intake manifold, holley stealth ram, extremely modified vortec TBI manifold, etc. The marine intake is the one that looks mostly stock and can probably get by smog if you have to.

Check this thread out on another forum:
http://www.pacificp.com/forum/viewtopic.php?t=317

There are a lot of knowledgeable vortec L31 guys over there that can help you out.

This is what I'm using:

Vortec Marine intake