Joe, Duke, et al

[Dennis C.]

Pardon for revisiting already plowed ground...
1. Is 64/65 365 HP "30/30" cam available. If so, P/N & source.
2. What again is your "better" recommendation, P/N & source.
Thanks very much, Dennis

[Joe C.]

Re: Joe, Duke, et al

Dennis:

Federal Mogul Sealed Power EN-146

Joe

[Joe C.]

Addendum

Dennis:

That is a Zip part number. The F.M part no. is CS118R.

[Tracy C.]

Re: Joe, Duke, et al

Dennis,

Duke will eventually hang a post here, but here is a direct quote from one of his previous that I copied to my hard drive....
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"You can buy a repro LT-1 cam (3972178) and lifter kit from GMPP, but I don't have the kit part number handy. Also the cam from Federal Mogul Speed Pro is CS-1145R and use with the AT840R lifters. These are the "edge orifice" type lifter that was OE with small block cams. Some of the aftermarket cam vendors also sell a clone. My first choice is Speed Pro.

Be sure you use a NAPA/Echlin VC1810 or equivalent vacuum can. The OE can on the '63 SHP/FI engines in not properly matched to the cam."
___________________________

I've ordered the CS-1145R cam and the AT840R lifters from Jegs. They are back ordered as Federal Mogul has to grind the cam. Couldn't find it any where else.

[Joe L.]

Re: Joe, Duke, et al

Dennis-----

The original camshaft used for 365 and 375 hp 327s in 1964 and 1965 was GM #3849346. This camshaft was discontinued by GM in December, 1971 and replaced by the GM #3972178 which is the 70-72 LT-1 camshaft. The LT-1 camshaft is actually a better piece and, overall, will provide better performance than the original 64-65 cam. That's why GM discontinued the original piece in favor of the 3972178. The GM #3972178 is now discontinued, too.

You can obtain a reproduction of both the GM #3849346 and the GM #3972178 from Crane. The Crane reproduction of the 3849346 is Crane #967251 and the 3972178 is Crane #969551. You can also purchase a Crane-manufactured reproduction of both of the above from GM as a kit which includes camshaft and lifters.

For the GM #3849346, the kit is GM #12364052; for the GM #3972178 the kit is GM #12364054. These kits are a great value.

[Duke W.]

Re: Joe, Duke, et al

I recommend the LT-1 cam to replace the Duntov and 30-30 for all solid lifter engine rebuilds or "upgrade" to mechanical lifter SHP specification.

The LT-1 cam has much better torque bandwidth than the 30-30 with just a little less top end power and a little more rolloff past the power peak. The LT-1 cam is the way to go for the street because it makes more average power across the useable rev range.

As Joe said LT-1 and 30-30 cam and lifter kits are available from GMPP. In addition to Crane, you can also buy either cam and both edge orifice and piddle valve lifters from FM Speed Pro. The LT-1 cam part number is CS1145R. The OLD 30-30 cam part number is TP118, but I don't have the current part number.

According to Clem Zahrobsky the FM edge orifice lifter is AT840R, but field reports indicate these are difficult to locate. The other available FM mechanical lifter is AT-992, and this is likely the piddle valve type.

The OE lifter on most mechanical lifter SBs is the edge orifice type and the BBs used the piddle valve type, which increased overhead oiling. From a practical standpoint either should work okay with a SB, but a street SB does not need the additional overhead oiling afforded by the piddle valve type.

Duke

[Dennis C.]

Thanks Guys, As usual, great response. DC *NM*