302 Chevrolet Engine Build

[MIKE JONES 302]

Originally Posted by MAURICE BLENDHEIM

Mike Jones you are doing a fine job, keep the Build updates coming. It's great to see a young fellow developing an ability. Your combination of parts should workout just fine, keep it light and low drag. The preparation of all the components are important, but you appear to have that handled. Keep up the "GOOD WORK"… Maurice.

Thanks! A member on here donated this 1967 small journal Z/28 windage tray, which was very appreciated, very hard to find piece. I will clean it and punch the holes out.

[Nmbr1GMfan]

Very cool! Lots of great members here that's for sure.

[Greg Reimer 7376]

Great looking engine build, but don't use OEM small journal rods. They break where the big end and the beam connect at the flare. Get the Manley rod or something else. The 67 engine DID use a 2 bolt main 327 4" bore block and a steel small journal 283 crank, so the assembly was very light for an OEM configuration. Also, do your early 462 heads have 2.02 intakes and 1.600 exhausts? I have a pair of those on my core shelf, and the rocker studs are cross drilled through the stud bosses with little roll pins through them and the studs. Only motor I ever saw like that were 62-65 hi po 409's. I wonder now if that is what these heads I have originally came on, if not a 68 325 horse 327. Very interesting engine build you have here.

[Hacksaw]

Originally Posted by Greg Reimer 7376

Great looking engine build, but don't use OEM small journal rods. They break where the big end and the beam connect at the flare. Get the Manley rod or something else. The 67 engine DID use a 2 bolt main 327 4" bore block and a steel small journal 283 crank, so the assembly was very light for an OEM configuration. Also, do your early 462 heads have 2.02 intakes and 1.600 exhausts? I have a pair of those on my core shelf, and the rocker studs are cross drilled through the stud bosses with little roll pins through them and the studs. Only motor I ever saw like that were 62-65 hi po 409's. I wonder now if that is what these heads I have originally came on, if not a 68 325 horse 327. Very interesting engine build you have here.

The 302 had a special 3" stroke crank, not a 283 piece. You can check the date code on your 462 heads, some had 1.94 intakes. The small roll pins were an early common fix to prevent the press in rocker studs from pulling out.

[Greg Reimer 7376]

Got motivated today, rolled my wagon out a bit to access the cylinder head rack, pulled out both those 462 heads, one has a date cast of H 6 6, the other one looked like H 12 6. Rather early castings for 462's, but they definitely have 2.02 intakes and 1.60 exhausts. I haven't taken them apart to inspect anything, but they were kind of interesting.

[Hacksaw]

Originally Posted by Greg Reimer 7376

Got motivated today, rolled my wagon out a bit to access the cylinder head rack, pulled out both those 462 heads, one has a date cast of H 6 6, the other one looked like H 12 6. Rather early castings for 462's, but they definitely have 2.02 intakes and 1.60 exhausts. I haven't taken them apart to inspect anything, but they were kind of interesting.

Greg: If there is no provision on the side of the head for the water temp sensor, then these could pass for 67 Z heads. Aug 6th and 12th 66 castings.

[Greg Reimer 7376]

Interesting. I will check this weekend for the water temperature boss and the threaded hole. Winder if these came on a 327 350 horse or even a '68 325 horse 327. When did the screw in studs and push rod guide plates come along?