Well now that I've settled on the 9.5 cr pistons, can anyone give me a good start on a cam?

Thanks

 

Anyone? Please

 

Check these guys out Cams. He goes through and grinds a cam for what you have and what you want to do with it not just something off the shelf.

Curtis

 

The 1970-71 cleveland engine should come with flat top pistons not dish. The compression ratio is 9-1. The horsepower rating is 250 with 2 bbl heads {open chamber} . These are factory specs from literature in 1970. If you want more compression and h.p. you will have to go with 4 bbl. heads. I have a 70 351 c-, and I just put 4 bbl. closed chamber heads on it, and the stock compression ratio is 11-1. The rated h.p. is 300 stock. The minimum octane fuel according to factory is 99.8 . I purchase 110 octane here locally for 4.50 a gallon, but it is just a weekend car not a daily driver. I also put a stage 2 cam in it and that brings it to about 350 h.p., and it is a heck of a difference over the 2 bbl. . With the proper fuel, it screams and has unbelievable power. For such a simple modification all stock parts except for the cam, it is a easy engine to build. If you put over a stage 2 cam in it, you will have a problem with low vaccum and it will not idle without a higher r.p.m. stall converter in the trans.. With the cam the proper timing setting is 10-12 degrees b.t.c. . If you were to put that engine in a mustang, you would have a bad *** car. The h.p. rating on the 429's of that year is only 370 h.p. . The heads and intake will bolt on to your engine, you do not have to change the pistons, just bolt on the heads to your existing block. You can have the power without the extra wieght and mods to make it fit. This mod will probably be cheaper, simpler, and more reliable than after market partsI will p.m. you with more info.
P.S., the aussie heads have smaller ports for fuel entry than u.s. heads. Probably smaller valves too.

 

For towing I recommend a Comp Cams 265DEH, or XE268 like Tim Meyer used in his motor. These cams will work with 9.5:1 CR. A Crane H272-2 or Comp 275DEH will work with a little more compression.

 

Ok another question here, my block is a D0AE-L and I have heard the 70 blocks have a shorter deck height. Is this true and is it a problem.

Thanks

 

All 351Cs have a deck height of 9.206". It never changed AFAIK. The older 385 series (429/460) engines had shorter deck heights in 69 & 70, 10.300" which was increased to 10.322" after 1972 to reduce the C.R.

 

Ok Thanks, the reason I ask was because when you look up set of 351C pistons at Summit and the K.B website, it says "1970 and earlier blocks have 0.020 in. shorter deck height and do not provide adequate stock for squaring or decking the block. 9.260 in. deck. Piston/pin weight: 582/143g." This may be for a 351W though.

 

Yes, that info on the change in deck height applies to Windsor blocks not Clevelands.