5.3 vortec in 91 blazer s10

i really wanna build a 5.3 vortec from ground up for my 91 2wd 2door blazer right now it has a 4.3 vortec with a 5 speed..ive been looking around for things to help me out with this but i havent found much has anyone here done this that can help or even know where i should look to find parts to make this swap easier?

5.3 is a good start.. do you want to go carbed or efi?

you should check out the performance sites like www.ls1tech.com and look around their classifieds and goto the 'truck' section and it sends to their sister site and check theirs. the 5.3 isnt desirable from a performance standpoint (well heads are on boost apps), but anyways, you can get a short or long block fairly cheap. a 700r4 will bolt right up and no use for the computer controled stuff, just get a painless lockup kit for it, if you want an auto.. if not, i'd get a t56 6 speed.

carb - long block, msd's standalone igintion setup and it comes with the coils, carbed intake for the LS1/Gen 3 style motors and of course a carb.

efi - complete swap including ecm, harness for the engine and it will come with one for the tranny. so get an auto motor if you want auto, manual motor if you want manual. also bet on sending your harness into speartech and having them do some work on it so its easier to wire into your existing setup. you will need to make motor mounts (this goes for both ways, carb or efi), they arent eh same sa the older smallblocks..

i'm sure i'm missing stuff.. but its a ton cheaper to go carb with one.

definitly wanna go efi 1999 and newer.i have a 99 silverado with the 5.3 n i love the engine i have little mods done to it and for wats done to it its quick for a full size. i can only imagine what it would do in a little blazer with alot of work done to it.

then just do like i said.. i covered a majority of what is needed.. a fuel pump upgrade i think is needed, the 4.3 is like 45psi or something.. an ls1/gen 3 motor is 60 i think. its something way up there.

good luck with it man.. i'm building a ls1 with a carb, to later go tb on carb intake. i'll be using a stock long block, GM intake, demon 650, stainless custom throley headers and a LG g3x4 cam, biggest u can go with stock valve train.. on efi this setup puts ~420 down to the rear wheels with a tune on efi.. not sure what i will do on carb.. going into my dime