What oil pan do you have? The muscle rods one is based around a car LS intake and alt setup from my understanding and doesn't directly clear the hood. The muscle rods kit uses a H3/colorado v8 pan which is about as thick in the front as a stock tahoe pan. If at full steering lock the oil pan BARELY clears the inner tie rod AND you swap to the small case alternator (think regular cab long bed 06 silverado with no options) and trim the hood reinforcement slightly it will clear the stock hood.
I have the small case alt with home made mounts that cleared the stock truck pan. I also trimmed the inner hood reinforcement. The alt will sit above the fender line but the hood is arched and clears.
If the inner tie rods have significant space to the oil pan at full steering lock it's too high for the SUV/pickup accessories. If you swap from the high output alt you have to the smaller one (if the tie rod to oil pan clearance is very small!) and possibly trim the inner bracing slightly it will fit.
EDIT:
I forgot to mention,
Do you plan to run AC? If you do, the engine placement becomes critical if you want to run the stock truck (actually V8 trail blazer gmt360 chassis compressor).
The muscle rods kit is kinda a boner in that the v8 colorado oil pan that comes in the kit is a very moderate improvement over the stock tahoe pan, so little improvement that it's almost worthless to swap in my eyes.
The holley 302-2, the 'whitebox' knockoff 302-2, super street performance or other improved front clearance pans, or CTS-V pan are all better pan options.
