So I am thinking on doing an engine build. And I have yet to build a 403, so I found a Pontiac 403 with a matching TH350 tranny. 403 is already torn down and bored .030 over. The 403 SB creates tons of torque with a mild amount of HP. The HP is easy to increase and I've honestly never seen a Burb with a 403. Will probably not help me on MPG. The 403 is a bastardized engine so rebuild kits for it aren't cheap. But alot of the parts for a 350 will fit with minor modifications. If I do get the engine I know one of the first things for it will be a block girdle, and because of the cooling issues, ensuring the cooling system is more than sufficient to overcome the blocks shortcomings. Thinking of going with all electrically driven accessories and just running two H.O. alternators off the crank (I LOVE my electrical accessories and tend to play with them more and more). Any thoughts?