So after all this, my 383 is coming apart yet again. SMH. I am not happy at all with the 218/228 on a 108 LSA cam in it after removing the Rhoads lifters. Its gutless down low, idles rough, and is not happy at all much under 2,000 rpm. My fuel mileage is also off about 3-4 mpg from what it was even at 70-75 mph on the highway. It is an overcammed slug without the rhoads lifters taming the cam. Then I had a GM LS7 lifter decide it wants to randomly collapse on cold starts when it is under ~40F. That sealed the deal. I am either going with Howards HRC91174 , Morel 7177s or Summit rebranded Morel 7177s lifters. After playing around with DD2003 and the Pat Kelley DCR calculator I have decided on a different cam. I am going with the Summit Racing 8800. It is a 257/267 @ 0.006, 204/214 @ 0.050, 0.480 lift with 1.6s and 112 LSA on a 111 ICL. It keeps my IVC at 61* compared to my current 61.5* but only has 38* of overlap compared to 61.5*. DD2003 was pretty close on the old setup as a overall power curve. The 8800 should give me 30-40 ft/lbs more down low in the RPM range and make more power all the way to 5,000 rpm with only a 9 hp loss at 5,500. Summit claims it has an Idle-5,800 rpm powerband. Currently DD2003 shows my 383 making 436 ft/lbs @ 2,000, 497 @ 3,000 and 513 ft/lbs @ 4,000. The 8800 shows 480 ft/lbs @ 2,000. 500 ft/lbs @ 2,500. 520 ft/lbs @ 3,000. Then up to 538 ft/lbs at 3,500. If the 8800 smooths out the idle, allows me to smoothly load the engine under 2,000 rpm without misfiring like the current cam, I would settle for the same torque I have now. I know the engine can run smoothly at low rpm and offer much more torque as it ran that way with the Rhoads V-Max lifters in it. 61.5* of overlap has a cool sounding idle but the internal EGR really kills off the low speed performance and mileage. I tried adding a couple degrees of timing to try to compensate for the slower burn of the EGR diluted mixture only to make the PCM pull it right back out as knock retard. Currently I am not even locking the torque converter until 68 mph in 4th gear and unlock it under 65 mph and have my shifts at 4,000+ rpm by 50% throttle and the shifts are at 5,500 rpm from 75% throttle to WOT. The current cam makes the engine want to spin up to make decent power. It currently reminds me of the way the stock 350 felt choking on EGR off-idle on the stock tune that opened the EGR valve nearly wide open just off-idle. EGR valve would open and the 350 would fall on its face with a horrible hesitation trying to pull the weight of the van against the stock torque converter and 3.42 rear gear. I would have to spin the EGR choking 350 almost 1,000 rpm higher to get the same torque, which only ate fuel.