[HWYSTR455]

Originally Posted by steve25

With those 3.73 gears even though there a tad too stiff for a street 455 atleast you will be far less likely to have ping issues if your compression is a tad too high for that 068 Cam.
If your going over to 3.08 gears with more then a 9.2 compression then a bigger Cam will be needed.

Originally Posted by chiphead

….Use a cam with at least 230* intake duration and 112-114LSA.

Totally agree with both of those comments, they are right on target.

What are you having done with it at the machine shop? Are those parts you listed already up there ready to be installed by the machine shop?

If so, ask how far in the hole the pistons are, and what the CC of the chambers are, and state to hold on going forward until you have that info.

When you say 'retain stock valve hardware', do you mean you have bottle neck studs and OE type rocker nuts? If so, convert while they are doing the heads, to straight studs and poly locks, you will be much better off.

Also, are the stock valves being reused? I would highly recommend you replace with some stainless one piece valves, as well as springs to match whatever cam you plan to use. If you stay within a 'range' of cam profiles, the same springs/setup can be used across them.

The typical hyd cam failures have been fading lately, and I hear less and less of those 'old' issues. So wouldn't be too worried about that as long as you maintain proper assembly (gobs of lube) and break in procedures.

Generally, wider LSAs tend to ward off det, and 114 would be a good choice. There's a number of grinds that will get you there, if you want suggestions, you can reply asking, sure there will be a good selection of suggestions provided. If you want trouble free, then stay away for fast closing ramps.

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