Just about to begin the assembly phase of my 1964 421 HO project after collecting pieces for it for the last few years. I'm just now gathering everything up for a trip to a friend's shop. He'll transport it to a trusted local shop to get all the machine work done and after that he will carefully put it all together. This Tri-Power 421 (370 HP factory rating with 10.75:1 compression) was only offered in the full-size Pontiacs (Bonneville, Catalina, etc.). It will be installed in a well-optioned 1964 LeMans convertible that was originally equipped with a 250 HP 2-barrel 326. This is the kind of swap that was done 'back in the day' when a Pontiac hot rodder found a wrecked 421 Bonneville in his local boneyard. I'm looking for it to make about 350 honest horsepower for cruising and road trips, the compression will be lowered to 9:1 so the engine will be happy running 91 octane fuel. This engine will probably never need to have the valve covers removed after it's installed. Oil and spark plug changes and an occasional ignition point adjustment will be all it will ever need, just as Pontiac engineering intended. Here are some pictures of most of the components, all taken before beginning any cleaning, machining or painting. Hopefully the pictures of the 1964 factory components will be of interest to the Pontiac fans here who are not as familiar with some of the features of the pre-1965 Pontiac engines. ------------------------------------------------------------------------ Crower forged rods, purchased over 20 years ago for a previous engine project, long before any good Pontiac rods other than factory 455 SD or BME aluminum were available. These are press-fit and will get bushings installed for floating pins. AutoTec custom forged dished pistons, the 23cc dish will get the compression down close to 9:1. Melling Select 60 psi oil pump and pump driveshaft. New harmonic balancer and hub. Cheaper to buy new than to have the original rebuilt, the new hub provides an unworn surface for the front cover seal. NOS Pontiac 9779068 'S' camshaft and new Johnson Hylift hydraulic lifters. Cam specs - 288/302 advertised duration (212/225 @ .050) .407"/.407" lift with 1.5:1 rocker arms. The '068' cam is best known as the 'Tri-Power cam' because it was used in most of the Tri-Power GTO engines. The '068' cam has the same exact profile as the 9770543 cam originally used in the 1964 421 HO. Note the 'S' identifier stamped on the nose of the cam. Cam thrust plate and mechanical fuel pump eccentric. The factory thrust plate closely limits the amount the cam can walk, no need for a thrust button here. H-O Racing VS-11 valve springs. H-O Racing HW-51 oil gallery plug set, the brass plug is drilled .030" to positively oil the distributor drive gear. This 3/8 NPT plug set replaces the factory press-in cup plugs. Cloyes Tru-Roller timing set. 1964 GTO 1111054 iron body points distributor, restored, rebuilt and recurved. Factory windage tray used on 1964 and earlier engines, it fastens to the #4 and #5 main caps. The lower dipstick tube is retained by the tray. From the top we have the lower dipstick tube, block tube and upper dipstick tube. Not at all like the common 1965 and later parts. 1964 oil pan, it has a slightly wider sump in order to accept the windage tray, 1965 and later pans are too narrow and won't fit. Rear oil pan seal reinforcement strap and hardware. Angled oil filter adapter to fit the A-body chassis. This 421 HO originally came with a 90-degree adapter mounted to a special spacer to angle it rearward to clear long-branch HO exhaust manifolds. This build will use the standard log manifolds. Corrosion-free 1964 timing cover. Water pump divider plates in surprisingly nice condition. Rebuilt original 1964 8-bolt water pump. Timing cover hardware and engine lifting hook.