dana44· Premium Member
Aftermarket can take care of the third member for the 7.25 these days as noted, the 8.75s for the A bodies are not too difficult to find, small bolt pattern is usually why they are easier to find, but that can be changed if you like, just keep your eyes open for one. Simply opening the stock heads with 1.88 stock 360 valves is a biggie, and the bore can handle them, porting is definitely a positive for more than 40hp even if the rest of it is stock. Just don't drop 360 or 340 heads on her, drop in compression is too great. Crank should have no problem holding up to a turbo if you go that route, it is a steel crank, same as the 318 actually, (even though there are some early 273 years that have a different bolt pattern for the flywheel if not mistaken), so not a difficult item to find, replace or get bearings for. I believe the cams were solid with adjustable rockers, which is a positive, and I think you could change that over to a hydraulic cam and different pushrods to have better adjustment. Make sure the Air grabber intake is for a 318, not a 360, port size is different and messes up flow if they don't leak.