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Username Post: 4 bolt main block        (Topic#360918)
chnaus 
Member
Posts: 51

Loc: Upstate:The Real New York
Reg: 04-18-03
05-11-20 10:12 AM - Post#2793515    

I have an 88 1/2t, bought 2nd hand and
a 98 3/4t with a target motor,2nd hand.

How can I tell if either has a 4 bolt main block

CH


 
Lead sled 
Frequent Contributor
Posts: 2005
Lead sled
Age: 60
Loc: Walton,NY.
Reg: 11-04-09
05-11-20 01:47 PM - Post#2793536    
    In response to chnaus

You may be able to find out by decoding the block casting #, if not,take the pan off of them and count the main bearing cap bolts

Late yr model (Dec. 51 BelAir/ 52 trim), with a basically stock 67 Camaro SS350/295hp Turbo Fire Edelbrock 1405, Saginaw 4spd/355 geared 55/6 Chevy rear.2,1st place,and 1 top five award trophies so far
http://www.picturetrail.com/bris51deluxe


 
bobb 
Super Senior Member
Posts: 5600

Loc: paradise
Reg: 09-05-03
05-11-20 09:35 PM - Post#2793570    
    In response to chnaus

bore scope through the drain plug hole

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
elcamino 
Dedicated Member
Posts: 5450
elcamino
Loc: Lake Superior-Michigan US...
Reg: 03-30-00
05-12-20 03:45 AM - Post#2793577    
    In response to chnaus

The targetmaster motors were 4-bolt. The other not likely.



Mike
2017 GMC Sierra Denali Ultimate 6.2L / 8-sp Z95
2017 John Deere X738 Snow Blower
2018 Polaris RZR S 900 EPS
2016 Polaris RZR 900 EPS


 
someotherguy 
Senior Moderator
Posts: 29131
someotherguy
Age: 50
Loc: Texas
Reg: 08-01-03
05-12-20 07:06 AM - Post#2793585    
    In response to elcamino

The Target Master 350 I pulled from a junked squarebody and installed into my '61 shortbed fleetside ran great! When I finally let that truck go as a roller and sold the engine to a friend, he installed it in someone's Caprice, and it promptly sheared off the balancer key from the crank. He took the engine back out and took it apart and discovered it had two completely different heads on it...and both had minor cracks.

Amazing though as it did run great for many thousands of miles.

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
elcamino 
Dedicated Member
Posts: 5450
elcamino
Loc: Lake Superior-Michigan US...
Reg: 03-30-00
05-22-20 06:36 AM - Post#2794463    
    In response to someotherguy

As a retired flint engine plant foreman (now deceased) once told me many years ago, to paraphrase;

"Back in those days, everyday there were engines that got pulled off the conveyor line for every reason you could think of and got sent to a repair area to be fixed. Sometimes they sat for weeks or months until they were repaired and shipped. So who knows what ended up where??

Mike
2017 GMC Sierra Denali Ultimate 6.2L / 8-sp Z95
2017 John Deere X738 Snow Blower
2018 Polaris RZR S 900 EPS
2016 Polaris RZR 900 EPS


 
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