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Re: 305 to 350 compatability
I believe the ports are much smaller on the 305 heads, hopefully someone else will chime in on this, i just know they won't work. The blocks will be the same, assuming the '87 block is a one-piece rear main / roller block.
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'86 GMC C30 Crew ~ '86 C20 Crew ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '74K10 ~ '71 Cheyenne swb ~'50 3100 bagged ~ '80 Wife ~ Late model kids
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