Tunnel Ram 383

Horse feathers! It will run great if you match the parts accordingly. Overcamming is however, the LAST thing you need to do, so be conservative there. Also, as most everyone has pointed out, you should have more compression. If you wanna retain the ability to run pump gas, 9.5 or so is the limit. It can be done well on that compression.....9.1 is a little low...and yes that extra half point or so can make a big difference. The biggest thing I recommend would be progressive throttle linkage......ESPECIALLY if you intend on running the 600s. Progressive linkage would be a big help there. best advice other than all that I got is, listen to people who RUN ONE. Old 340 8BBL knows what he's talkin about. His is a good combo. It can be done, because if puttin a tunnel ram on sumthin was the way to make one run "sluggish" or "not fast", how many of them sumbitches do you think would sell? Yeah. Not many. I've run several tunnel rams in the past and they ran great.....but that was twenty plus years ago so my experience don't count. Listen to those who run them now and follow their advice.....even if it's different than mine cause times change and better stuff comes out. You can do it and make it fly.