273 cam suggestions

273 cam suggestions

After reading everything you wrote below, I think the cam listed would do fine with the 3.23 and stock stall converter and tire size. The best mix of exhaust manifolds would be 1 340 exhaust manifold and 1 early Magnum exhaust manifold. You'll have to stand by for the part number IF I can find it, but it comes from the first few years of the Magnum exhaust manifolds mostly found in Dakota's and Ram's. The outlet size is the biggest @ 2-1/4 inch.

I wouldn't go to much larger for a cam myself with the running gear you have now.

Port the 302 heads? OR go to Magnum heads? Often a catch 22 since porting the head is going to be more expensive than getting new Magnum heads, but the rest of the conversion parts needed will just about balance an out to equal price tag.

The only big bennifit in the Magnum head use is the 1.6 ratio and the better ports as cast or ported over the "LA" head, but that's more money over the intail conversion. Catch 22 again.

Your call.

CUDAGUY said
heres what the rest of the package will consist of, looking for suggestions for a very hot cam for the 273 in my Valiant wagon

original 273 shortblock (compression test shows 120psi accross the board)
late 80's #302 swirl port heads...cleaned up but unported...stock valves
stock replacement 340 valve springs
performer intake
holley 600cfm vacuum secondary carb
recurved distributor/mopar orange box....maybe GM HEI
not sure about what to do with the manifolds...probly using stock early-A's
904 auto
3.23 gears

I have a mopar '759' cam in my 318 and it will soon be riding the shelf...heres the specs....

http://www.summitracing.com/parts/DCC-4452759/

too big for a 9:1 or so 273? I have all the valvetrain to go with it as well

CUDAGUY said
the '759' cam is really choppy in the 318 that its in now...way more than the 340 cam was. Its pretty worthless under 2k but pulls hard to 7k. the manifolds probly wont stay, I will most likely atleast upgrade to 340 or magnum manifolds.

GM HEI is an upgrade in my opinion, no ballast resistor, no 'box' to melt goo all over the place, 14-volts to the coil....and always able to find an HEI unit if it does go bad unlike the mopar stuff

CUDAGUY said
Id love to just upgrade to commando specs! $$$$$:tongue9:

CUDAGUY said
street/strip car...any street action is usually from a roll and most likely drag action will be on street tires.

as far as upgrading to commando stuff...its later on down the road, the pistons are the killers and the cam I can get cheap locally, but Im after more off a 'hot rod' type vehicle since Im lacking one.

Im not really after a HUGE cam just something pretty edgy for that small of a motor