Quote:
Originally Posted by Dan Case
I don't know it this link will work, but here is an article with some very scant information on the original application for 58 DSF models....a small block Ford race only engine. The picture is one of several Ford published in the 1962 early 1963 time frame showing an aluminum push rod valvetrain engine being developed for the INDY 500.
Auto History Preservation Society - Tech Pages Article |
This link has some errors. The HiPo 289 came out in spring 63. They don't mention the intake valve size increasing to 1.78" and what is up with the "The last year for the 302 4-barrel was 1970", without any mention the 69 and 70 were a Boss 302?
But has anyone ever heard of this? The 315hp 302 in 68? News to me.
"For 1968 only, a special high-performance version of the 302 was offered for the Shelby GT350. Its main features included a high-rise aluminum intake manifold, a larger Holley four-barrel carburetor, and bigger valves; 1.875" (intake) and 1.6" (exhaust). It had a longer-duration camshaft, still with hydraulic lifters. The block was a higher nickel content casting made in Mexico. "Hecho en Mexico" casting marks are present in the lifter valley, and its main strength was the appearance of much larger and stronger two-bolt main bearing caps on the engine's bottom end.
The heads had special close tolerance pushrod holes to guide the pushrods without rail rocker arms or stamped steel guide plates. The combustion chambers also featured a smaller quench design for a higher compression ratio and enhanced flow characteristics. Heavy-duty connecting rods with high strength bolts and a nodular iron crankshaft were also included in this package. It used high flow, cast iron exhaust manifolds similar to those on the 289 Hi-Po K-code engine. It was rated at 315 hp @ 6,000 rpm and 333 ft lbs of torque @ 3,800 rpm. This engine block is considered the strongest production 302 block other than the Boss 302 and the Trans Am 302. The package cost $692. It was not popular and did not return for 1969."