Head question
Thread Starter
Member
Joined: Nov 2008
Posts: 113
Likes: 0
From: Harrodsburg,Ky
Car: 89 T/A and 97 Formula (sunny days)
Engine: 305 TBI / LT1
Transmission: 700R4 / 6M
Axle/Gears: 89 IDK / 97 3.73
Head question
I plan on doing a little work on my TBI 305 in my 89 T/A and I was wondering if anyone knows what head castings are on this. I have found a set of 187's which I see came on a 305 HO,58cc chambers. I dont want to drop compression if the stock heads have smaller chambers. I plan on putting in some 1.94 intakes & 1.60 exhaust valves in the 187's along with a little port work. I also picked up some Edelbrock headers for $50 and I'm going to instal my LT1 cam I took out of my 97. I want to boost performance without hurting my mpg.
TGO Supporter
Joined: Oct 2002
Posts: 9,067
Likes: 1
From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Re: Head question
187 are the stock TBI heads. The HO and TPI came with 416 or 081 castings, both of which are arguably better than the 187 castings.
TGO Supporter
Joined: Jul 2003
Posts: 4,803
Likes: 2
From: Grand Rapids, MI
Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
Re: Head question
I agree with Adam. Add 601's to the list of "better than 187" list. Any of those 3, in my opinion, are a much better platform for P&P work than 187's.
Thread Starter
Member
Joined: Nov 2008
Posts: 113
Likes: 0
From: Harrodsburg,Ky
Car: 89 T/A and 97 Formula (sunny days)
Engine: 305 TBI / LT1
Transmission: 700R4 / 6M
Axle/Gears: 89 IDK / 97 3.73
Re: Head question
Hummm,the site I found the info might be incorrect then. I did find it odd that these heads I found came off of a 91 Caprice and they were HO heads. Anyway,I can get them for $25 for the set. With some bigger valves and port work they will still be better than what I am running. I just want alittle more hp and I'm not looking for a real fast car with the 89. Thats what I have my 97 for.
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Hummm,the site I found the info might be incorrect then. I did find it odd that these heads I found came off of a 91 Caprice and they were HO heads. Anyway,I can get them for $25 for the set. With some bigger valves and port work they will still be better than what I am running. I just want alittle more hp and I'm not looking for a real fast car with the 89.
On Probation
Joined: Oct 2008
Posts: 6,319
Likes: 19
From: Northern Utah
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: Head question
I've had the 350 version of the swirl-port heads on the flowbench, they don't respond to porting. 
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