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Hi everyone.I need a little help from you guys.I purchased a '93 model 454 complete motor from a truck that caught on fire and I was going to just re-ring the pistons and put new main and rod bearings in it and run this motor this summer.But when I took the heads off i found that had afew more miles on it than I had thought and these heads are not real good for power.Anywat my question is can I put a set of closed chamber heads('68) on this motor ?Are they able to bolt up with water passages work?What will the compression be? The only reason i want to use these heads(closed chamber) is because they have been reworked with bigger valves ,springs ,new valves,new guidesand I already have them.Any help would be greatly appreeciated.
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There is way better to choose from. Closed chamber is the least desirable, by design.
Aftermarket heads will reward you. Pawn the others.
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Gen 4 heads wont work on a gen 5 block due to leakage into the lifter valley. Supposed to work on a gen 6 block. I did it and didn,t have any problems. Find some vortec gen 6 heads they outflow the old style heads, and have small efficient chambers and the exhaust port works alot better. You can find them on e-bay pretty cheap.
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The Edelbrocks bolt right on either block and are cheap alternatives.
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I have a set of done up gen 6heads ready to go....$500
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It can be done . You can run mk4 heads on a gen 5 block. you have to fill in 1 water port on each side of the block up towards the lifter valley. then you have to run a special head gasket. it is a Pain in the arse. I know because i just built this exact motor . Don't do it . find yourself a MK4 block then you can run whatever head you want.
Ironman
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I have a set of done up gen 6heads ready to go....$500
This looks like a very good idea.:)
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Or you could score yourself a set of '049' heads (casting #353049) off of eBay for pretty cheap. I got mine for $300 ($100 of that was shipping) and had the 2.19 intake and 1.88 exhaust valves installed in them.
For a cam, I'll be checking out the Isky cam kit from HTP.
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I agree... just get some later castings that are already good to go on the newer block. The 68 closed chamber heads (even if they were installed on a performance engine) are pathetic compared to todays standards. Take advantage of todays technology.
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Not to compete, but I have new, take-off gen 6 heads (934's), complete with all hardware, including pushrods, lifters, timing set and timing cover and cam, from a 502 Mag, if you want to stay OE. PM if you are interested.
