300 inline 6

11:1 compression

big solid lifter cam, roller rockers

750 Holley

nitrous

Top Loader 4 speed

For those of you who don't know, the 300 inline 6 was a truck-only engine. It is the "big block" of inline sixes. Passenger cars got the "small block" 144/170/200/250 engines that were completely un-related. A stock 300 inline 6 makes a hair more torque than a stock 302 V8 but it's horsepower is severely limited by the 1 barrel carb and economy-minded cam pattern. This one doesn't have a 1 barrel carb, or a crappy cam obviously. Note how close the back of the engine is to the firewall. Its also so close in the front that a mechanical fan could not be used

Edit: obviously not my car.