Imco Thumper Power Exhaust BBC
#11
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Happy to see you got new upgrade good guy parts. Certain you'll have some good gains. Regarding cam I'd really try and get some good advice before you make a change. If I recall you had an even duration and lift which with your old heads might have suffered some however with your new changes with much better exhaust from the port to the headers you might like your existing cam. You go much bigger on cam you might tend to lose velocity. Just a thought for you and my opinion of course. Again I'm happy for you with you upgrades.