Though hot rodders like performance, there are other constraints to consider when installing an engine. Both weight and physical size are two other points to consider, so STREET RODDER decided to illustrate the physical size difference between three engines: the 4.6 Ford, the 351W Ford, and the 350 Chevrolet. For this comparison, the height is measured from the bottom of the oil pan to the air filters mounting surface. The width is measured from the outside edge of each valve cover, and the length is from the face of the bellhousing to the water pump pulley. All measurements are approximate.

The Ford 4.6 DOHC with Inglese IDAs and TREMEC five-speed transmission
Width 29.25 inches
Length 23.625 inches
Height 31.5 inches
TREMEC length: 31.375 inches
Overall length with TREMEC five-speed 55 inches

The Ford 351W with Edelbrock RPM Air Gap manifold and single carb (with 2-inch spacer) and Borg-Warner five-speed transmission
Width21.5 inches
Length28 inches
Height28 inches
Borg-Warner T-5 Length31 inches
Overall length with T-559 inches

The Chevrolet 350 with triple Rochesters (with 1-inch spacers) and TH350
Width22 inches
Length27.75 inches
Height28.5 inches
TH350 Length27.5 inches
Overall length with TH35055.2 inches

Edelbrock (Carbs)
Hot Rod Haven
3400 Democrat Road
TN  38118