Ok now that I have some more time to describe what is going on with my S10 blazer.
The Block is a 350, 40 over I have stock rods with K/B flat top pistons. The cam is a Lunati part # 638-00016lk Adv. Duration is 284deg Gross lift .458" at 110 lobe sep. At the time of perchase the sheet said Strong low to midrange torque. The heads are from World Products with 2.02 in and 1.6 exh with 64cc chamber I found out when I got them that they wher 305 heads, light casting.
The blazer is a 1990 4/4 I wanted to keep the Blazer Tbi for the drivabilty factor, so I went to my nabor hood junk yard and got an intake, dist, Ecm and Tbi with good injectors.
I also installed a aftermarket prom, to help out the Ecm. I have noticed that the motor runs best with 8' base timing, I dont know what the total advance is.
I do think that I might have a vacumme leak cause I did notice on the way home from the shop that it did surge at the stop sighn. I will double check for any vacumme leaks especialy a leaky intake cause I did have to scunt the 4 center holes to get the intake to fit the old heads. What I would like to know is how I can get more vacumme out of this cam wether it be by retarding the crank, or with that lobe seperation Im stuck. Cause to do a cam swap It would be easier to pull the motor back out than to get the cam out the front. Or can I supply an artificial vacumme sourse. Im kinda limited on room for a belt driven pump, but might be able to fine some room for a electric pump. Tommorow I will double check my valve lash and do a compression test, and if that all looks good then I will drop the exhaust and see how it runs, that should get the neighbors up so they can have something else to cry about
I will keep U all posted. Thanks for any help, and all the help.

If it dont Go chrome it !!!