What happened to the big power numbers of the 454? The last generation big-block by GM (Vortec 454) leaves much to be desired when it comes to output. The Vortec big-block was gifted with a sequential ...

Any engine builder will tell you how important cylinder heads are to power and performance, so enthusiasts looking to spruce up their budget Chevy 305 small-block (SBC), or the larger and more popular ...

In the early-'90s, GM introduced the Second-Generation LT1 small-block. It featured reverse-flow cooling and an aluminum cylinder head with a new port configuration. In essence, the company created ...

GM small-block Chevy Vortec heads deliver great performance per dollarbut theyre still only based on production pickup-truck castings. The iron heads are heavy. They have press-in rocker-arm studs ...