Help with 340 compression + cam change

Thought I'd add a bit of update:

Just talked with Steve Slavik at Lunati (for about a half an hour) about a solid tappet cam recommendation for the 340. He says I should run Lunati's Voodoo 264/272 solid lifter cam (235/243 at .050 with .525/.546 lift, 110/106 lobe center) maybe advanced a few degrees, and he recommended their beehive springs. This is their smallest of the catalog Voodoo mechanical cams.

I'll probably ponder this for a bit before ordering. Still thinking about the Howard’s 220@50/.506 lift 108 single patter hydraulic.

I've been running a Lunati cam and I like the idea of staying with them. Also Steve started at Ultradyne with Harold Berkshire so I feel he knows his stuff, and this is one of Harold's designs. I also like that, as I've always heard great things about his cam designs.

He said they would grind me a single pattern on 108 LC, but that this design would add top end and be about the same at lower rpm's on the street.

Although the cam info says "needs 10:1 compression" he said that he's not as concerned about that part as a lot of people. The cam is listed as 2400-6600 RPM range, and he says that he has always thought it should be rated as starting more like 2000-2200.

So I may order the cam/lifters and beehive springs, etc. as a package from Lunati. Steve assures me that this will wake up the motor! My 273 rockers/shafts are well beyond wear limits. I may have Rocker Arm Unlimited rebuild mine if it doesn't take too long, or look for a set with less wear, or just run these???

Anyway, at least I have the new timing cover painted to match the block. (Got mine from Rick's Mopars on ebay ...Rick Ehrenberg's ebay store).