I've got a 1967 318. I plan to rebuild over the winter. I want to put on a pair of FAST BURN 302 casting number heads. To raise compression, and to get hardened valve seats. I also plan to use the MR GASKET head gaskets (.028 compressed) to up compression. With 302 heads, and thin gaskets might get .75 more compression. I would also like to install a factory 1985 up roller cam + matching roller lifters + matching push rods (all of the parts that were used together). I've never changed up mismatched parts like this before. Bit unsure. Can someone tell me if the above will fit and work on my 1967 318. Next question...is changing to the roller cam and parts worth the trouble ? Last question...of the stock roller cams in the PRE MAGNUM engines. Were there any years that had better (hotter) roller cams ? This is just a driver. Is this plan worth the cost ? Re build the heads+ used roller cam parts.
...not too sure how long this thread will last... I won't tell you that the parts will or won't work and what bits go with what pieces since I get the feeling you have limited experience in this endeavor. Why swap the parts when there are plenty of Magnum engines available and you know all of the pieces work together? If you are 'unsure' about making the parts work then perhaps it is best to use a proven package. I will recommend that you read up on Mopars engine packages from the 'old' days as they spent plenty of money making them work. These can be found in the old Mopar Engine Manuals. A newer edition, like ebay # 290984640196 is not a bad choice. .
If you are going with a stock rebuild, whats wrong with the hydraulic flat tappet cam and the stamped rockers? They are about as bulletproof as you can get and they last forever. Why go changing things when what you have works just fine? Instead of swapping heads and mixing and matching parts together, why not just stab in a hotter cam, a 4bbl dual plane intake, a 600-650cfm carb and a decent set of headers? That right there will get you that "oomph" you can feel in the seat of your pants way more than simply bumping compression up by a half point and using parts that may not work together at all. You can rebuild your existing heads with new hardened seats, 3 angle valve job, have the ports cleaned up for flow, and you know they will work! Dont try to re-engineer something that has worked flawlessly for the last 50 years or so... Posted using the Full Custom H.A.M.B. App!
Yeah I could do that. But the cost alone to have hardened valve seats installed is big $$$. I f I started with the 302 heads should be cheaper. As for the roller cam thing , its just a thought. Since it would be dirt cheap.
The only problem will be that the lifter on the 85 are longer that the ones on the 67. And the housing in the block will also be shorter. I'm not saying it won't work but its something to look in to. There is roller lifter kits from Mopar performance. you maybe able to buy shorter lifters.
If memory serves me roller blocks have a boss that lifter guides bolt to. non roller blocks don't have them
The cam is a no go the block has taller lifter bores, and bosses cast in for the spider ***embly that holds the lifters square in the bore, but definitely go with the 302 casting heads, they are MUCH better than the 67 heads, have a nice closed swirl port combustion chamber that will get you more compression, not to mention you can buy a set of good cores for less than installing hardened seats in your old heads as you already know. Just call Hughes engines and tell them the specs of your build and they will set you up with a nice hyrdraulic flat tappet cam designed for the Mopar .904 lifters (Faster ramps on the lobes to take advantage of the larger diameter lifters Mopar uses) that will get you what you want. With a 4 BBL intake, and free flowing exhaust you should get an easy 300-320 HP if you do a good valve job and a little pocket porting on the heads. If they clear your ch***is the early (92-93) Magnum exhaust manifolds flow great, and don't have the typical header issues. The later manifolds are more restrictive to help emissions and have smaller outlets for the head pipes.
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