The 235 is probabaly the stronger engine. It's major problem was fuel distribution and shared exhaust ports which keeps the cylinders from all producing the same power. But with headers and a three one barrels (the high compression blue flame six set up it) will keep up with most small block V-8's (which is why Chevrolet was the last GM divission to get a V-8). A small block V-8 is a common transplant and is easy to do. As with any motor bigger is better, so do not limit yourself to 350 when there are a lot of other combinations available.
Last edited by Big Dave; 11-14-2009 at 08:48 AM.