Couple specific questions for you guys.. 75' c10

[stock75]

Hey guys happy Easter! after the usual church and brunch this morning i got out of the suit n tie and started wrenching, got a fair amount done but ran into a couple specific questions, I searched but did not find the specific answers I am looking for.

1. Picked up a set of ram horn manifolds, when installing these will the y pipe need to be replaced or modified or will it be a semi close fit? Also is there an upgrade from the y pipe I could do while I am at it i know i have heard the term x pipe thrown around? As it sits now it has a new flowmaster 40 series on it with new 2 1/2 tubing from the y pipe back.

2. Transmission coolers, was thinking I would like to install a trans temp gauge, and that got me to wondering if there is any company that makes an after market better than stock transmission cooler, I am referring to the small rectangular one that is mounted on the radiator.. that is a transmission cooler correct??

3. Carb and intake selection: About ready to start adding horsepower to the engine, going to start with the carb/ intake, what would you guys suggest overall? Not too far down the road the truck will get a mild cam as well as worked heads, so it would be ideal to get a carb and intake now that wont flood my engine with fuel and air but still meet the demands of my build later on down the road, is this possible??

I think thats all for now.. keep your eyes open for a build thread I think the time has come..

Thanks

Ben