Passenger side accessories bolt hole size on AFR heads help

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Sep 23, 2015 | 08:12 PM

355tpipickup

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From: meridian, idaho

Car: 92 1500p\u 2wd

Engine: 91 z28 tpi 355

Transmission: 91 700r4

Passenger side accessories bolt hole size on AFR heads help

So I used the bolts from the stock cast iron heads for accessories bracket on the driver side with my AFR heads and they fit great but the passenger side AFR heads bolt holes or smaller or have a diff thread pitch. I can get the bolt to start maybe one thread befor it stops....what bolt size do the AFR heads take on the passenger side?

Sep 23, 2015 | 08:25 PM

Damon

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From: Philly, PA

Re: Passenger side accessories bolt hole size on AFR heads help

Shouldn't be the case. They're all 3/8-16. Front, back, left, right... doesn't matter.

Sep 23, 2015 | 10:35 PM

Justins86bird

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From: Another world, some other time

Car: 86 LG4 & 92 TBI Firebird

Engine: The Mighty 305!

Transmission: 700R4

Axle/Gears: 3.42

Re: Passenger side accessories bolt hole size on AFR heads help

The threads might not be cut right. Might want to run a bottom tap thru there and see if they clean up.

Sep 23, 2015 | 11:32 PM

Night rider327

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From: Bowdon, GA.

Car: 1988 Camaro

Engine: 355, 10.34:1, 249/252 @.050", IK200

Transmission: TH-400, 3500 stall 9.5" converter

Axle/Gears: Ford 9", detroit locker, 3.89 gears

Re: Passenger side accessories bolt hole size on AFR heads help

All SBC gen 1 heads, stock, aftermarket, afr, brodix, dart, etc.... Uses ONLY 3/8-16 for acc. bolt holes in ends of heads and for exhaust manifold/header bolt holes.