A freind pulled a 454 out of a motorhome to replace one in his pickup.
(kinda off topic I know but...) He'd like any info anyone can give hime on
these engines. Both the engines have heads that seem to be marked as "Hi
Perf". Pics here:
the truck casting reads GM12T mfg 1975; the RV; GM(I?)T mfg 1978
Both have 4 bolt main bottom ends. Are these particularly rare or desirable
engines? Would putting one in a farm truck be a waste?
Any help, hints, or comments wold be appreciated.
hmmm....Heads came in either square or oval port versions. Generally they
make good powerplants for trucks that pull loads....plenty of torque.
They tend to get poor gas mileage though. We had one in a Suburban...it
got 11 miles city and ll.3 highway....and 10.8 pulling a 23 foot travel
trailer. I kept looking back to make sure the trailer was there. If I
was going to pull a load often I'd use the 454....for general use go with
Casting # Info from Mortec
361959.....454.......73-90...2 or 4 bolt
346236.....75-87...oval port...OPEN chamber...454, 120cc chamber, 225/116cc
336781.....73-85...oval port...OPEN chamber...454, 118cc chamber, 256/114cc
Nothing to write home about, Fairly generic 454. But it seems your heads are
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.