Thanks for the kudos and great information. I still want to build a killer 273 but to get it there it would cost thousands of dollars and be so radical that it isn't fun to drive. All the drag racers I know that have screaming small blocks leave the line at 8,000 and get run down by a big cube engine that doesn't break 5,000 r's (I can't believe I said that).
Great info here too. If you build a powerfull 273 nad keep the 10" flywheel, find yourself a multi disc clutch or find a clutch shop that can beef up the pressure plate for more grip.
Yes, Yes, Yes! I think the Isky E4 cam is a great replacement for the original 273 cam. You can stick it in a stock automatic car and have no idle or low vacuum problems. It will rev to 5000+ and still get you mileage on the highway. I have not tried any other cams but I am sure they will give you extra power. The stock hypo cam was a bit bigger than the 2 barrel cam but any of the above mentioned sticks will do a nice job with your 273. A 4 barrel is a must. You can benefit with a dual exhaust and/or headers as well. A good ignition won't gain big horsepower but it will make the small block more efficient. I tuned my distributor and it made a big difference in how peppy it ran. Lighter springs/ quicker advance and total around 35° is the key. Lots of threads here on FABO about that..Don't overbuild your 273. If you want a street animal, build a 408 stroker. (I can't believe I said that. I am a huge HP 273 fan) LOL tmm
