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#1 |
Registered User
Join Date: Mar 2008
Location: Rhinebeck Ny
Posts: 23
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305 to 350 compatability
I have an 87 gmc sierra with a tbi 305. I have a 350 engine short block out of a 94 chevy k2500 tbi. will the heads from the 305 work on the 350? What else would i have to change? I know i would have to put injectors for a 350 in it. but would the comp be the same? any input would be greatly appreciated! Thanks!
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#2 |
Registered User
![]() Join Date: Jul 2006
Location: Ozark, MO
Posts: 4,887
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Re: 305 to 350 compatability
no the heads won't work. check around on Craigslist, a set of 350TBI heads could be had for maybe $100 and remanufactured heads can be had from builders for a few hundred. Use the 350 injectors, get a new EPROM from the donor truck if it's the same drivetrain or somewhere like www.tbichips.com. Everything else is a direct swap. If the later truck has a serpentine set up use it too. Let us know how it goes.
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'20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids
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#3 |
Registered User
Join Date: Mar 2008
Location: Rhinebeck Ny
Posts: 23
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Re: 305 to 350 compatability
HI Thanks. What is the difference between the 350 heads and 305 heads. Is an 87 350 short block identical to a 94 350 short block? Thanks!
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#4 |
Registered User
![]() Join Date: Jul 2006
Location: Ozark, MO
Posts: 4,887
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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.
__________________
'20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids
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