Stock 396s are machined for 3/8-inch valve stems (as are most big-block Chevys). These valve stems measure 11/32 inch. "I really don't know that it will make a difference at all, but they intrude ...

Building a big block Chevy engine that is affordable, reliable, street drivable and, ... Block. Stock, 4-bolt. Sonic tester selected. $250. Pistons . Ross + 125. 12:1 with heads milled. $660.

Complete Chevy Big Block Build & Testing - Action-Packed Big-Block Test We Pick Up 116 HP With A Simple Swap To RHS Pro Action Heads, Edelbrock Intake And A Lumpier Comp Cam. HOT ROD Staff Writer ...

Let's start by making something very clear. This is not your typical big-block Chevy street head. With a 440cc intake port, these heads are clearly intended for big-inch, big-power race applications.

However, users online have reported that GM Parts Direct once offered a conversion kit that allowed the use of a 502 big block in place of the stock 454 in 1991-1993 C-10-through-30-Series Chevy ...

It’s not clear how much power the Big Block makes in the new COPO Camaro, although Chevy sells a version of it in crate engine form, which produces 727 horsepower at 6,800 RPM and 680 pound-feet ...

A Chevy big block brings the thunder, whether you're roasting tires with a rowdy 454 or towing your toys in an 8.1L Vortec-powered rig. However, let's get one thing straight — these engines aren ...

It’s a C8 Chevy Corvette with a direct-injected, 8.1-liter big-block running variable valve timing, all thought up by Larry Hofer—a General Motors performance guru who literally wrote a book ...

Chevy's Vortec 8100 — AKA the L18, AKA the Vortec 8.1 — was the last of The General's big block V8s, a line of engines that traced its lineage clear back to the fire-breathing muscle cars of ...

The 454 LS6 V8 engine is a rare Chevy big-block V8 from 1970. Labeled as the LS6, the 454 made 450 hp with a single 4-barrel ...