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Old 07-14-2003, 03:28 PM
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Roller Cam Conversion

If you are converting a Ford 302 non-roller block to a roller block using the spider piece and stock lifters, is it necessary to use a special camshaft with a smaller base circle? or can you use a regualr cam?
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Old 07-14-2003, 03:45 PM
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as far as i know the tops of the lifter boses must be machined flat for the lifter allignment bars to rest flat the valley must be tapped to hold the spring down and you need to use a cam button to keep the cam from walking "the stock roller 302 uses a retaining plate"and you must use a cam designed for a roller lifter, as they are perfectly flat and a flat tappet cam has an angle grond into it to keep the cam in place. your best bet would just be to get a retrofit roller setup from like crane cams. basically you dont want to put rollerlifters on a flat tappet cam.
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Old 07-14-2003, 04:11 PM
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I did this conversion last year on my 70 302 block. I used the comp cams hyd roller set up with the spider. I had to drill and tap the valley in 2 spots to hold the spider down and also where the dog bones sat on the lifter bores you had to make sure they sat flat on the top of the bores. I had to do a little grinding. If I did this again I would definately go with the lifters with the link bar alignment setup. This would eliminate the whole spider deal. I would go with the same manufacturer for the lifters and cam. Also call the cam help lines for advice. Good luck!
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Old 07-15-2003, 02:11 AM
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all small fords use a retaining plate. you can use flat tappet cams in a roller block without the spider/dog bones, but you have to do some machining to use a roller cam in a flat tappet block. You cant interchange roller and flat tappet cams. Roller cams are steel and require a steel or bronze distributor gear.
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