High, its been a while since I have been on here, I have a 71 mach1 , 351c m-designation , 4v, large port closed chamber or quench head, I have rebuilt the motor 2twice now, last time was 15 years ago, the machine shop never balanced the motor and I thought they did, kept vibrating and oil psi would drop, after only 700 miles I pulled it apart and all main bearings were to the copper, machinist said maybe I got bad bearings, he checked the crank and said it was fine, put it back together and the oil psi at start up is like 90psi, then after a half hour it drops to around 20psi, I don't drive the car anymore, it only has about 4,000 miles since last rebuild, I read your discussion about the oiling probs, and now im going to tear it apart again and want to clarify what I need to do as far as oiling system goes, I asked this a while back and i don't remember what the answer was, (old age),,
#1. I want to put a roller cam in it,,, do I need lifter bore bushings and cam restrictors? or just bushings, or just restrictors? this car is just for street, no racing, once in a while ill let her eat...I would like to beat a new mustang if i could once in a while.....
#2. do I still use a high volume oil pump?
#3. anybody have any recommendations for a good street roller cam?
#4. I have an edlebrock 4v intake on it right now, I noticed the intake ports are smaller than the ports on the heads,I called edelebrock and I was told this was on purpose to increase volume, should I keep this intake or look for a different one? my car has factory (functional) ram air so the intake needs to fit under the hood.
#5. If the crank is bad (cant be turned anymore) I might look into a scat stroker kit, not sure though, the crank was 10/10 and the block is not even 30 over yet, so not sure if I want to bore it if I don't need to (kit comes with 30 over pistons).
#6. I found you guys are the best to talk to about the 351c, nobody knows anything about it where I live, and I really appreciate your help!!, IM still looking for a pantera to buy, that's near me, but I have to make the Mach1 right, my dad bought the car bran new in 71, hes only 1.5 years away from being 70, want to finish it for him..
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