273????

D Dart had 275 HP, was about a 550 lift short duratio ncam hi reving little monster.

You can take the stock heads and stuff like a set of 360 2b head valves, I think only some minor notching to the block, and mill them babies to get the compression up. Or have Ross make a set of 10:1 or 10:5 pistons for it. More cam is going to kill the low end and it needs to compression to help it out. I think crane and or Isky stil lmake a cam similar to the old 4b 273 cam. DO NOT over duration you will be sorry, stay with tight lobe centers too! I spent 15years working and building dozens of combo's this little guy like the Ford 289 likes lift on the cam, but the lack of cubes lacks torque. So it needs to rev to make power and it can. I found a 318 on a budget was the way to go. But if you want the 273 for a comando clone then I say go for it.

Here are a few after market intakes to look at for the 273. Sorry but I sold a Holley street dominator for an early 273 a while back on this site to a guy.

Also I have used a 2 plane edlebrock intake, modified the divider to act like a single plane ut with a 2 plane design. This seemed to work best onthe street, help top end past 5500 rpms, but was more torquey at 2500-4k.

http://store.summitracing.com/partdetail.asp?part=OFY-5699&autoview=sku

http://store.summitracing.com/partdetail.asp?part=OFY-5489&autoview=sku

Even a dual quad is still i nthe works too
http://store.summitracing.com/partdetail.asp?part=OFY-5697&autoview=sku

All these are in the 360 design, hi and low rise design.

master link for you.

http://store.summitracing.com/egnsearch.asp?N=700+4294839079+4294924707+4294908110+115+4294840077


Have fun with with it and do a budget to see what it is gonna run for the engine. Yep the 904 built will be fine, you can add some of the later stylee drums, front pump etc to beef it up with better bands etc. A 727 will fit it is very tight and the lip on the floor board has to be bent over. You will be more than ok with the 904..