Hope you have money,
As a small block racer for over 25 years, its easier for a first timer to run a blown BBC because the stock parts are beefier than a SBC.
Major area of concern with a small block is the crank snout because its small dia, short, and the hub retaining bolt is only 7/16 dia. What happens is the load the lower blower pully puts on the hub stresses it because the snout ends at the end of the timing cover and with the 2 keyways so close to the seal surface will split when the crank hub bolt begins to stretch.
3 ways to fix this
1) Buy and aftermarket SBC crank that has a BBC snout which is larger in dia and a larger hub bolt
2) buy a lower hub/pulley support girdle as it supports the pulley on both sides to releive stress load
3) At minimum, ATI offers a front hub that has a SB bore and a BB seal dia which gives you extra material and will not split, just open the front cover(if the manf does not have one alrerady) to a BBC front seal.
A good set of aluminum rods is the next step, Some people have run steel rods, but they tend to beat on the crank harder because they dont absorb the compression shock like alu does. Also go with the longest rod you can on a stock stroke, I run 6.125 (6" is OK) because it keeps the rod angle down and straightens out the load on the rod beam.
Because of the alu rods you will need a small base circle roller cam for clearence as the assm. rotates. Make sure the cam is made from tool steel billit material or it will break back by the #8 lobes.
For compression on alc. keep it around 10/10.5 (mines 10.2) and dont get all caught up in any fancy ring packages, I have been using Childs&Albert/Akerly&Childs "Dura-Moly" ring sets for years, simple and they work besides being a lot cheaper then the fancy ones.
If you dont have access to getting your heads O-ringed, Some people have been using the COMETIC shim gaskets, I havent as I prefer Copper.
The blower manifold you have is fine, just convert the pop-off to a burst panel
Speeds and ETs at 7.50 and 175mph a hooped up Vertex or even a fresh stock Vertex will work fine. Anything quicker or faster will need more amps and a FIE mag III fits the bill and fits in the stock possistion.
Dont go all crazy on the blower either, a standard opening 6/71 is more than plenty and will get you in enough trouble as is
Injection is just metered fuel and there are many options. Size wise stay with a standard "BUG", it will flow more air then the blower can handle and run all the fuel thru the hat, down or port nozzles just mess everthing up at this point and are not needed. You wont need a hi-speed check valve system, so its just one feed line to the BV and one return out of the secondary back to the tank.
Fuel pump choices tend to stay with at minimum side for alc is the Enderle 80a or the Hilborn pg150, both flow around 6.5 gallons of fuel
