you must get that special wedge tool, if you try to bypass this, the chains will loosen and the ratchets will expand and you will be in trouble.. you will havt to take a part the whole front end to reset the ratchets (a bitch!!) you can make your own spanner wrench from a piece of metal stock from lowes etc. down load the manuel and have it readly available. google 4.7 camshaft install and there should be another forum where a guy shows a lot of pic, with a step by step process. torque wrench a must.. put the cam caps and bolts on a shoe box and make sure they go on EXACTALY the same as they came off, even the bolts. i beleive theres a mark on the crank pully and the front of the block that reference the top dead center mark. good luck with your project.. by the way theres a matching manafold thats suppose to work well with that cam. check where you bought it..
mafosa