I put the UD/Lunati "LS-6/L-78 replacement cam" in my L-78 clone (I don't know the Lunati # offhand). It replaced a repro stock L-78 cam (same exact specs). The UD/Lunati is a solid lifter, 238/238 deg duration @ .050 lift vs 242/242 for stock. UD/L is .550/.550 lift vs .520/.520 stock. UD/L 112 deg LSA vs 114 stock. The UD/L idles and sounds just like the stock one did but has much more low end torque and feels noticably stronger throughout the rpm range. Has plenty of vacuum for power brakes, a little more than stock. Stock type GM valve springs worked well but one caution: Be sure to check stock rocker arm slot clearance. I had interference on some exh rockers and had to lengthen the slots by grinding.
396/375 cam replacement
Hi folks,
I am in the process of a tear down over haul of my 396/375 from my 70 Chevelle and would like some opinions... The car is pretty heavy since it has a/c , ps, pb and several other options and it is a cruiser. It is pretty much stock with the exception of a set of Hooker Super Comps ( which are flat on the bottom from hitting about every speed bump it has ever crossed and are likely to be replaced with Heddman Elites) and a Torker R-2. Car is a 4sp with 3.55 posi.
I think I will go back with a stock alum hi rise intake to better fit the cowl induction set up. I will drop the comp to about 10:1 if I have to overbore the engine , otherwise it will be the stock 11?:1 pistons and rods.
I am looking for cam recommendations and any other suggestions u might want to offer. Comp recommended an XR282HR as a roller cam option and a XE268H for a flat tappet suggestion. I want to have enough vac to have reliable brakes along with a good lumpy idle. I would like to get a power boost if possible and like the idea of the hydraulic roller cam but wonder if the extra cost is worth it. I also plan on roller rockers but I want them to fit under the stock valve covers (is that possible?).
Any help you could offer would be greatly appreciated.
thanks!:beers:
edit - good info so far...anybody else want a shot?:thumbsup:
I am in the process of a tear down over haul of my 396/375 from my 70 Chevelle and would like some opinions... The car is pretty heavy since it has a/c , ps, pb and several other options and it is a cruiser. It is pretty much stock with the exception of a set of Hooker Super Comps ( which are flat on the bottom from hitting about every speed bump it has ever crossed and are likely to be replaced with Heddman Elites) and a Torker R-2. Car is a 4sp with 3.55 posi.
I think I will go back with a stock alum hi rise intake to better fit the cowl induction set up. I will drop the comp to about 10:1 if I have to overbore the engine , otherwise it will be the stock 11?:1 pistons and rods.
I am looking for cam recommendations and any other suggestions u might want to offer. Comp recommended an XR282HR as a roller cam option and a XE268H for a flat tappet suggestion. I want to have enough vac to have reliable brakes along with a good lumpy idle. I would like to get a power boost if possible and like the idea of the hydraulic roller cam but wonder if the extra cost is worth it. I also plan on roller rockers but I want them to fit under the stock valve covers (is that possible?).
Any help you could offer would be greatly appreciated.
thanks!:beers:
edit - good info so far...anybody else want a shot?:thumbsup:
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