I've been checkin out sbc threads, and I get the feelin' that 383 may not be what I want to build for my 89 sillverado w/ 700r4. Back in the late 80's, I put together a .030 over 350 using an isky cam, (memory fails me) that had a dual grind, just under .500 lift, slightly more than 220 degee duration (@.050), with 12 degrees of overlap. I used springs and lifters supplied with the kit, and had access to a valve spring test tool, so I shimmed to get the spring pressure equal at full compression, 10.5:1 flat tops, floated pins, matched ports, torquer intake with a quadrajet that i tweaked, ground the choke horn off and polished the top for smooth airflow, and of course a good set of equal length hedmans, 2 1/4" exausted through corvair mufflers. I dont know what it was, but for some reason this small block, in a 78 nova hooked to a borg/warner T-10 was almost scary powerful. Took me a while to figure out how to get it to hook up, but when I did it fragged two of those T-10's before I realized clutches were cheaper to replace. Never dynoed it, HEI wouldn't let it go much over 5500, just wanted to shame a few 5.0's, which it definetly did. My question is this... will a 383 out tourque that 350? Being I will have limited options if I want to keep my efi/esc setup which is stock now, use a (I hate this) RV cam, and the ecm which has a 300 hp chip in it already. Truck has headers (shorties) flowmasters, and 2 1/4" exhaust, as well as K&N on the inhaler. Is there torque to be gained with a plenum type intake, or some other aftermarket intake? The truck runs decent as is, just needs to be a little more of a thrill. Lookin' at prices, it'll be about the same either way. Just wish there were some way to get a good lope into the engine at idle. I figure that I won't ever twist up past 5000 r's ; the O.D. keeps it doin 70 mph @just under 2000 r's.