273 Stroker, 4.00" Crank

273 said
To get decent pistons you need custom anyways for a 273 but most I'd go is the 360 3.58" stroke and still have great rod ratio and decent bore to stroke ratios. Out of the 4 small blocks the bores size is the only real differences and limit for power on each. What the limit is for a 273 who knows but probably ain't that many 350 plus hp 273 running around. I sure someone with the talent and equipment probably could squeeze a lot more if they were so inclined to do so.

We have a similar thread on Moparts and we've been talking about standard stroke builds. One guy has one in the 350+ hp range. He hasn't given much info on the engine. I believe it's 0.060" over...

I haven't denied mine but I'm thinking May 300 to the rear wheels. My 273 has a lot of trick thinks like low ring tension, offset balance, head porting and work on the runners. We were able to get 116% port velocity and about 168 in flow. That's with a 920 head, stainless 1.88 valves cut down to 1.84.