# 350 or 383 sbc **URL:** https://forums.speedlife.net/t/350-or-383-sbc/187866 **Category:** PittSpeed Automotive **Created:** [February 5, 2007, 8:58pm UTC](https://forums.speedlife.net/t/350-or-383-sbc/187866 "2007-02-05T20:58:46Z") **Posts on this page:** 1 **Showing post:** 49
### Author: ![Orr89rocz](https://avatars.discourse-cdn.com/v4/letter/o/ac91a4/32.png) [@Orr89rocz](https://forums.speedlife.net/u/Orr89rocz) #### Post date: [February 6, 2007, 1:37pm UTC](https://forums.speedlife.net/t/350-or-383-sbc/187866/49 "2007-02-06T13:37:18Z")
> [@FOUND MY CAPRICE](https://forums.speedlife.net/t/found-my-caprice/27800/5): > > bore and stoke a smallblock to 454 and add heads with similar specs as a big block and see what happens. horsepower numbers could be similar but advantage big block with its bigger heads (ie, chambers and runner dimensions) . it will make more torque to by the same reasoning. i believe i seen comparo’s like that… they might be able to hang with hp numbers but never match the big blocks torque curves. and its hard to get a small block head to flow like big bigblock heads… some of those bigblock heads flow 350-380cfm…i never seen a small block 23 degree head flow more than 330 or so. AFR’s best right now i think is 320. > > [@lady problems.](https://forums.speedlife.net/t/lady-problems/27650/320): > > I always thought these were the best deal around for a starting point… > > > [http://paceperformance.com/index.asp?PageAction=VIEWPROD&ProdID=18295](http://paceperformance.com/index.asp?PageAction=VIEWPROD&ProdID=18295) not bad but the one problem i see with GM’s 383’s is that they use a 3.80 inch stroke…forged crank so its strong but it also costs near 1100 bucks… thats why that crate motor is so expensive. it has extra 1000 bucks in a crank that you dont need. you can get a forged crank for 600-700 bucks that will handle as much power, and use common sized pistons and rods designed for a 3.75 inch stroke instead of the 3.80. but the motor doesnt have forged rods or pistons…so those will go way before the crank ever does. i always hear ppl breakin rods/pistons but never cranks…even on cast cranks. they should knock off 500-700 bucks off that crate motor. --- _[View the full topic](https://forums.speedlife.net/t/350-or-383-sbc/187866)._